How we choose and verify products

Which products qualify

The maker publishes the number that matters. For a holder, that's its thickness rating or internal size. For a binder, which holder its pockets take. For a slab product, which grading companies it fits. No published number, no pick.
We can show the exact product. Every product has a photo from its maker's own product page, matched to that exact product. If we can't get one, we swap the product. No stock images, no AI-generated product images, no Amazon images.
The maker sells it directly, so the link goes to the source of the specs.
Coverage over volume. We cover every common protection layer before adding a second or third option to any one of them.

Current catalog: 559 products from Ultra PRO, Vault X, Dragon Shield, KMC, EVORETRO, BCW, Gemloader, Gamegenic, Ultimate Guard, Cardboard Gold. Specs and photos checked October 15, 2026.

What we don't claim

We haven't lab-tested or hand-measured these products. When we quote "archival-safe", "acid-free" or "UV", those are the maker's words, in quotes, not our findings. We don't show star ratings or review counts.

How prices work

Each price comes from the store's own product page: the maker's online store, or a specialty retailer whose listing we matched to the maker's exact SKU. We record the store, the date we checked and the pack size, and refresh weekly. A price older than seven days is hidden; a sudden move of more than 40% is held for a person to review before it appears. Stores outside the US show their own currency. We never show Amazon prices; use the Amazon link to see the current price there.

Fit Finder rules

Thickness: a card fits a rated holder when its thickness is at or below the rating. The smallest rating that fits, within the same maker's line, is the exact fit. Larger ratings fit with room. Above the rating, it won't fit.
Near the limit: within 5pt of a rating we add a check-first warning. Ratings describe the card; a sleeve adds film the rating doesn't count.
Sleeves: if a maker says a holder is "designed for unsleeved cards" (Vault X magnetic holders), a sleeved card won't fit. If a maker says nothing, we flag it. Double-sleeved cards in rigid holders stay unverified unless a maker addresses them.
Card size: standard-size products don't take jumbo or booklet cards. Japanese-size cards in standard products stay unverified unless the maker sells a Japanese size.
Binders and boxes: we use the maker's stated contents ("252 cards in 35pt Toploaders") and published inside dimensions. For example, BCW's 800-count box is 3-3/4" deep inside, so a 4"-tall top loader won't stand in it.
Graded slabs: a product is an exact fit only for the grading companies its maker names. Vault X slab sleeves exclude thick-card holders and slabs with guards. Unnamed companies, including TAG, stay unverified.

These rules are fixed code, unit-tested across every thickness from 10pt to 400pt and every slab option, with no AI deciding results.