A mixed comics + BD + manga collection is best managed through a unified five-dimension taxonomy (type, publisher, series, issue, language), strict physical separation by format (longboxes for US comics 17×26 cm, vertical shelving for hardcover BD 22×29 cm, shelving for manga tankobon 13×18 cm), and an application tag system that distinguishes comics-us, bd-franco-belge, manga-shonen, and manga-seinen. Proper preservation requires three different bag sizes tailored to each format's dimensions.
More than half of French collectors share their shelves with three distinct publishing families: American comics, Franco-Belgian hardcover albums, and Japanese manga in tankobon format. Each has its own dimensions, bags, publisher, numbering logic, and market value. Managing all three without a structured system leads, within 18 months, to an unworkable mess: a 1955 Tintin first edition shelved next to Walking Dead, One Piece volumes scattered between shelves and longboxes, duplicate Astérix purchases made from sheer forgetfulness. This article lays out a complete method for handling a hybrid collection: a unified taxonomy applicable to all three formats, recommended physical separation, format-specific preservation, coherent application tags, real-world breakdown examples for 800 and 2,000 items. The logic applies to any serious app that models a "type" field in its database.
Why a unified taxonomy beats three separate databases
The first instinct for a multi-format collector is to create three separate inventories: an Excel sheet for comics, a notebook for BD, a note app for manga. That approach breaks down mechanically once you hit 300 combined items. Cross-format searches become impossible ("everything I bought in 2024," "total value this quarter," "anything over $50"), global stats stay fragmented, and sales or loans never get centralized.
The technical solution is a five-dimension taxonomy applied uniformly across all three formats: type (comic / bd / manga), publisher (Marvel, Casterman, Shueisha), series (Amazing Spider-Man, Tintin, One Piece), issue (issue number, tome, volume), language (VO US, VF, VOSTF, Japanese). This grid applies equally to Amazing Spider-Man #129 (type=comic, publisher=Marvel, series=ASM, issue=129, language=VO US), to Tintin On a marché sur la Lune EO 1954 (type=bd, publisher=Casterman, series=Tintin, issue=17, language=VF), and to One Piece volume 100 (type=manga, publisher=Glénat, series=One Piece, issue=100, language=VF).
The operational advantage is measurable. On a collection of 1,200 items split across 600 comics, 300 BD, and 300 manga, the unified taxonomy lets you generate in under 5 seconds: breakdown by type, total value, this month's purchases, unpriced items, potential cross-format duplicates. A three-database setup forces you to export, merge, and reprocess data manually for every query — 30 to 45 minutes per operation.
For modeling details, the article BD, comics, manga: classification rules covers edge cases (graphic novels, comic strips, Korean manhwa, Chinese manhua) that require an arbitration decision before entry. The My Comics Collection app natively includes this multi-format "type" field.
Physical separation: three distinct storage zones
A unified taxonomy in the app does not mean unified physical storage — it means exactly the opposite. All three formats have incompatible dimensions, weights, and preservation requirements. Mixing an Amazing Spider-Man #1 (US 17×26 cm) with a hardcover Tintin album (22×29 cm) in the same box crushes the comic and damages the album. Three separate zones are non-negotiable.
Comics zone: longboxes or shortboxes. The American standard for comic floppies is the cardboard longbox, 71×18×29 cm, which holds roughly 250 to 300 bagged-and-boarded issues standing upright. For 600 comics, plan on 2 to 3 stackable longboxes. Shortboxes (36×18×29 cm) hold 150 issues and work better in tight spaces. Upright storage — comics in plastic bags with backing boards — is the norm. Average cost: $13–$20 per empty longbox, $28–$40 for a premium acid-free shortbox.
BD zone: vertical shelving, 30 cm deep. Franco-Belgian hardcover albums (22×29 cm) stand upright on a shelf, spine out, exactly like a bound book. Minimum shelf depth is 30 cm to accommodate variations between publishers (Dargaud, Casterman, Delcourt, and Soleil all differ slightly in format). For 300 BD, plan 6 to 8 linear meters of shelving — two standard IKEA Billy bookcases. The convention is to organize by series then by volume number: complete Tintin run, complete Astérix run, numbered Largo Winch series.
Manga zone: dedicated shelving, 18 cm shelf height. The Japanese tankobon (13×18 cm) wastes space on a BD shelf: a 29 cm slot accommodates the 18 cm manga with 11 cm of empty vertical space. Manga collectors prefer lower-profile shelving (IKEA Kallax 33×33 cm cubbies in double rows, or dedicated 18 cm-height shelves). A 33×33 cm Kallax cubby holds 30 to 35 tankobons depending on cover stiffness. For 300 manga, plan 10 cubbies — one 4×4 Kallax unit.
This physical separation provides a complementary benefit: location tracking in the app. A "location" field ties each entry to its zone (Longbox 2 Row 4 / BD Shelf Level 3 / Kallax Cubby B2), bringing retrieval time for any specific item to under 30 seconds even across 2,000 items. The full method is covered in protecting your comics: preservation guide.
Different bags by format: three distinct standards
Clear plastic bags are the foundation of physical protection. But using a comics bag for a manga, or a BD bag for a comic, damages both the item and the bag. Three standards coexist.
Current US bags for modern comics. Dimensions 17.8 × 26.7 cm, 2 mil (50 microns) for regular use or 4 mil (100 microns) for long-term storage. The bag is rectangular with a flap. Always paired with a backing board (acid-free rigid board, 17 × 26.5 cm) to keep the issue flat. Cost: $8–$12 per 100 bags (2 mil with boards), $18–$25 per 100 premium 4 mil bags. For Silver Age and Golden Age comics (1956–1969 and pre-1956), Silver (17.5 × 26.5 cm) and Golden (19.7 × 26.7 cm) sizes exist to accommodate the thicker paper of vintage issues.
BD bags, 22×29 or 24×32 cm. The standard Franco-Belgian hardcover format is 22×29 cm (Tintin, Astérix, Lucky Luke, classic Dargaud series). Slightly larger modern albums (Blacksad, some Delcourt editions) require 23×30 or 24×32 cm bags. BD bags are polypropylene, 50 microns minimum, without a flap for everyday use or with an adhesive flap for archival storage. Cost: $28–$40 per 100 bags (22×29 cm). For first editions (Tintin EO 1955, Astérix EO 1961), acid-free archival bags are mandatory — $55–$90 per 100. Tintin EO market prices run from $900 to $20,000+ depending on title and condition, which more than justifies the expense.
Manga tankobon bags, 13×18 cm. The standard Japanese format is smaller — 13×18 cm for Shueisha, Kodansha, and Shogakukan titles. Purpose-made bags run 14×19 cm with or without a flap. The manga bag market is less developed than in the US: French specialty suppliers (Atomic Empire, Pulp's Comics) offer packs at $17–$25 per 100. For Japanese first printings (One Piece volume 1 first edition 1997 Shueisha, valued at $400–$650), archival bags are justified. For current French VF editions (One Piece volume 100 at $7.80 cover price), a standard 50-micron bag is sufficient.
Application tags: recommended naming by format
Beyond the five structural fields (type, publisher, series, issue, language), a free-tag system lets you refine classification. A consistent naming convention prevents duplicate tags from proliferating (manga-shonen vs. shonen-manga, comics-us vs. US-comics, bd-franco vs. bd-belge) — a classic problem once you pass 500 entries.
Recommended comics tags. The comics- prefix structures the branch: comics-us (Marvel, DC, Image, Dark Horse), comics-indie (indie Image, IDW, Boom!, Vault), comics-vf (French reprints: Panini France, Urban Comics, Delcourt), comics-key (key issues with first appearances), comics-cgc (graded copies), comics-variant (variant covers). On 600 comics, aim for 6 to 10 active tags max, combinable by filter (comics-us + comics-key + comics-cgc returns your graded American key issues).
Recommended BD tags. The bd- prefix covers the sub-families: bd-franco-belge (Tintin, Astérix, Lucky Luke), bd-aventure (Blake & Mortimer, Largo Winch), bd-humour, bd-thriller (XIII, Insiders), bd-fantastique (Donjon, Thorgal), bd-jeunesse (Boule et Bill, Cédric), bd-album-EO (first edition albums pre-1980). Modern albums in graphic novel format (Persepolis, Maus, Sapiens) can get the bd-roman-graphique tag, covered in managing graphic novels in an app.
Recommended manga tags. The manga- prefix maps to official Japanese demographics: manga-shonen (Shonen Jump, One Piece, Naruto, Demon Slayer), manga-seinen (Berserk, Vagabond, Vinland Saga), manga-shojo (Fruits Basket, Nana), manga-josei, manga-kodomo. Supplementary tags specify the French publisher (manga-glenat, manga-kana, manga-pika, manga-ki-oon) and format (manga-tankobon standard, manga-perfect-edition, manga-omnibus). The article managing a manga collection in an app gives the full list.
This three-prefix naming convention (comics-, bd-, manga-) stays coherent across 5,000 items with no conflicts. It exports cleanly to CSV for external analysis or home insurance documentation, and remains readable over time even if you switch apps.
Typical breakdown for 800 and 2,000 items
Two real-world examples anchor the method to what an average French collection and a large one actually look like.
Collection of 800 items, estimated value $6,500–$10,000. Typical split: 400 comics (50%), 250 BD (31%), 150 manga (19%). Physical storage: 2 stacked longboxes in a closet for comics, one 80×202 cm Billy bookcase for BD, one half-Kallax (4×2) for manga. Preservation budget: $90 in comics bags (400 items at roughly $0.22 each), $95 in BD bags (250 at $0.38 each), $32 in manga bags (150 at $0.21 each) — $220 total. The ROI is immediate: on a Walking Dead #1 first print Image 2003 kept Near Mint (raw value $1,300–$1,700, up to $10,000 in CGC 9.8), a $0.30 bag prevents a loss of several hundred dollars.
Collection of 2,000 items, value $27,000–$43,000. Expanded split: 1,100 comics (55%), 500 BD (25%), 400 manga (20%). Storage: 4 stackable longboxes in a climate-controlled basement (humidity 45–55%, temperature 64–72°F), two 80×202 cm Billy bookcases for BD (12 linear meters), one full 4×4 Kallax for manga. Annual preservation budget: $270–$430 (gradual bag replacement plus new acquisitions). At this volume, app-based tracking becomes essential: trying to manage 2,000 items from memory or a notebook mechanically results in 5–10% silent duplicates — 100 to 200 items purchased twice without realizing it.
For large collections, the article Comics Manager: complete guide details the constraints beyond 1,000 issues, and the My Comics Collection app natively covers all three formats — unlike most English-language apps that are limited to US comics.
Managing edge cases and borderline items
Some items resist strict comics / BD / manga classification. A consistent arbitration decision prevents endless re-tagging.
American graphic novels. Maus by Spiegelman, the hardcover Watchmen edition, the Sandman Vertigo omnibus: these are comics by publishing origin (DC, Marvel, Image) but hardbound like BD albums. Recommended convention: type=comic, with the supplementary tag bd-roman-graphique or comics-omnibus depending on your angle. Physical storage follows the format (BD shelving for large hardcover volumes).
French-translated comics in BD format. Marvel France or Panini Kids editions translated into French in the 22×29 cm hardcover BD format are comics by content (Spider-Man, X-Men, Avengers) but BD by physical format. Convention: type=comic, tag comics-vf, storage with comics or BD depending on your organizational preference. Consistency in the app matters more than theoretical perfection.
Korean manhwa and Chinese manhua. Tower of God, Solo Leveling, Noblesse in French editions: technically not Japanese, so not "manga" in the strict sense. Recommended practice: type=manga by convention for storage and pricing purposes (same 14×19 bags, same collector market), with supplementary tag manga-manhwa or manga-manhua to distinguish them in filters.
Classic comic strips. Calvin and Hobbes, Peanuts, Garfield complete collections from Hors-Collection: hardcover BD format, US strip content. Convention: type=bd (for storage and format), tag bd-strip-us. Details in strips, trade paperbacks, and omnibuses.
Trade paperbacks and omnibuses. TPBs and omnibuses collect multiple comic issues in a single bound volume. Convention: type=comic, tag comics-tpb or comics-omnibus, plus the relevant series tags. The article omnibus vs. floppies: collection strategy covers the tradeoffs between buying issue by issue vs. in collected editions.
Common mistakes in mixed collections
Four structural mistakes appear repeatedly in poorly managed multi-format collections. Catching them early saves dozens of hours of reorganization down the line.
Mistake 1: mixing formats in the same storage. Stacking comics, BD, and manga in the same box to save space causes mechanical damage within 6 months: crushed corners, bent spines, torn bags. Investing in three separate zones once you hit 200 combined items prevents these losses.
Mistake 2: using the same bag for everything. Buying a single pack of "universal" 22×29 cm bags for comics, BD, and manga seems economical but destroys comics (floating, corner folds) and manga (huge empty space inside the bag). Three bag standards, three distinct uses.
Mistake 3: inconsistent tagging. Mixing singular and plural (comic-us vs. comics-us), uppercase and lowercase (Manga-Shonen vs. manga-shonen), French and English (bd-aventure vs. bd-adventure) produces a completely unusable taxonomy within 12 months. Lock in a written convention (lowercase prefixes, international English for comics and manga, French for BD) from your very first tag.
Mistake 4: forgetting format-specific valuation. The three markets do not use the same sources. US comics: completed eBay sales, GoCollect, GPAnalysis. Franco-Belgian BD: BDovore sales, Catawiki, Le Livre Rare Book. Japanese manga: Mandarake, Yahoo Auctions Japan, Suruga-ya. A comics manager that only prices US comics leaves 30–40% of your collection's value unknown. Use a multi-format app or supplement manually.
FAQ — Mixed comics, BD, and manga collection
Is it better to use three separate databases or one unified database?
A single unified database with a "type" field is technically superior once you reach 300 combined items. It enables cross-format searches (total value, monthly purchases, cross-format duplicates), global stats, and a single export for insurance purposes. Three separate databases require manual merges for every query — 30 to 45 minutes per operation. The unified cataloging method covers the details.
What are the exact bag dimensions for each format?
Modern comics (Current US): 17.8 × 26.7 cm, 2 to 4 mil. Silver Age comics: 17.5 × 26.5 cm. Golden Age comics: 19.7 × 26.7 cm. Standard Franco-Belgian BD: 22 × 29 cm, polypropylene 50 microns. Large-format BD: 24 × 32 cm. Manga tankobon: 14 × 19 cm. For first editions (Tintin EO 1955, One Piece volume 1 Shueisha), acid-free archival bags are mandatory.
How much does full storage for a mixed collection of 800 items cost?
Budget roughly $220 for bags ($90 comics, $95 BD, $32 manga) and $165–$275 for longboxes and shelving depending on what you already have. That's $385–$495 to protect a collection valued at $6,500–$10,000 — a protection ratio under 6%. The conservation budget pays for itself immediately on key issues.
Should I shelve French VF comics with my BD?
VF comics published in hardcover BD format at 22×29 cm (Marvel France, hardcover Panini Kids editions) can be shelved with BD albums for physical consistency, but keep type=comic in the app. VF comics in the standard US softcover format at 17×26 cm (classic Panini series) stay in longboxes with the US comics. The decision follows physical format, not content.
What tag naming convention avoids duplicates?
Format prefix in lowercase (comics-, bd-, manga-), followed by sub-genre (comics-key, bd-franco-belge, manga-shonen). International English for comics and manga, French for BD. Written convention locked in from your first 10 tags. Avoid variants (comic-us AND comics-us, manga-shonen AND shonen-manga) that make filters inconsistent past 500 entries.
How do you value a mixed collection?
Three distinct sources: completed eBay sales and GoCollect for US comics, BDovore and Catawiki for Franco-Belgian BD, Mandarake and Yahoo Auctions Japan for Japanese manga. A multi-format app ideally integrates all three sources. Otherwise, do a manual annual valuation for BD and manga and use automatic pricing for comics. The free appraisal service covers American comics.
Should manhwa and manhua be managed separately from manga?
Recommended convention: type=manga for storage purposes (same 14×19 bags, same shelving) and consistency, with tag manga-manhwa for Korean titles (Tower of God, Solo Leveling) and manga-manhua for Chinese titles (The Outcast). The distinction is preserved in filters without multiplying base types, which simplifies exports and global stats.
Should you photograph every item in the app?
For standard items (current manga at $7, modern BD at $13–$16), photos are optional. For comics key issues, BD first editions, and Japanese first printings, front-and-back photos are essential: proof of condition for resale, insurance documentation, precise variant identification. Budget 30 seconds of photography per high-value item.