Card Thickness Gauge

A free, downloadable reference guide for matching trading cards, relics, patches and other thicker cards to an appropriate toploader, magnetic holder or protector size — no email required.

Understanding Card Thickness

Trading cards vary significantly in thickness depending on their construction. Toploaders and magnetic holders come in eight common depths, from 35pt up to 360pt — 35pt is the usual starting point for a standard card, while relics, patches and other multi-layered cards can need much deeper holders. These are common examples rather than fixed rules — always check the individual card before choosing a holder.

35PT ≈0.89 mm

Standard cards

The shallowest common holder size, sized for a standard card with no added material or extra layers. Fits most base cards, parallels and standard foils.

55PT ≈1.40 mm

Thicker stock & light inserts

A modest step up for cards on thicker stock or chrome/foil-board construction, or with a very thin single layer of material beneath the surface.

75PT ≈1.91 mm

Relics & thicker inserts

Suited to thicker inserts, relics and memorabilia cards that need more depth than lighter card stock.

100PT ≈2.54 mm

Thick relics & patches

For thicker relic, patch and memorabilia cards where 75pt does not provide enough comfortable clearance.

130PT ≈3.30 mm

Patch & relic cards

Suited to cards with a noticeably thicker or multi-layered embedded piece — enough added depth that a slimmer holder would leave the card sitting too tight.

180PT ≈4.57 mm

Multi-swatch & jumbo patches

For multi-piece or unusually bulky embedded material that doesn't sit flat within a thinner holder.

260PT ≈6.60 mm

Extra-thick memorabilia

Extra clearance above 180pt for unusually bulky or multi-layered construction.

360PT ≈9.14 mm

Booklet & oversized relics

Built for genuinely oversized construction — booklet-style cards that fold out, or unusually large multi-piece material.

A note on sizing

Card construction and holder sizing can vary between manufacturers, so these are typical examples rather than fixed rules. If you're unsure, use the printed Gauge to compare your card and choose the closest safe fit without forcing it.

Choosing the Right Size

Use the Gauge as a quick reference, or print it at Actual Size for calibrated physical comparison.

Preview of the VaultifyUK Card Thickness Gauge reference guide

Quick Reference

Use the pt and mm figures above, alongside the kind of card each size typically suits, to identify the holder you're likely to need — no download required.

Physical Comparison

Download and print the Gauge at 100% / Actual Size — do not use “Fit to Page” or other scaling. First check that the printed calibration line measures exactly 50 mm with a ruler.

Once verified, hold your sleeved card edge-on alongside the thickness bars to find the closest safe size. Choose the closest safe fit without forcing the card — if it falls between two sizes, move up rather than forcing a holder that's too tight.

Download the Gauge (PDF)

Bars are printed at true physical scale — verify the 50 mm calibration line before comparing your card.

Frequently Asked Questions

Is this a precise measuring tool?

It's a reference for choosing a standard holder size, not a substitute for a precision caliper. That said, the printed thickness bars are intentionally dimensioned for physical comparison once you've verified the 50 mm calibration line with a ruler.

Do I need to print it at a specific size?

For physical comparison, yes. Print at 100% / Actual Size — do not use “Fit to Page” or other automatic scaling — then verify with a ruler that the calibration line measures exactly 50 mm before comparing your card. If it doesn't, adjust your print settings and print again. If you're just reading the pt/mm reference information on screen, printing isn't necessary.

Which size should I start with?

35pt is the usual starting point for a standard trading card. Relic, patch and other thicker memorabilia cards typically move into larger sizes — use the reference table or the printed bars to check.

My card doesn't sit right in any of these sizes — what do I do?

Choose the closest safe fit rather than forcing the card — a little clearance is fine, but it shouldn't rattle freely. If it does, use a purpose-made card-safe insert or spacer to reduce movement. Never use improvised packing that could mark or damage the card.

Once You Know Your Size

Protect your collection

Explore VaultifyUK Shield sleeves, toploaders and magnetic holders designed to help protect cards across your collection.

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