Protect every card worth keeping with a soft sleeve first. Put valuable cards in a penny sleeve inside a toploader or a magnetic one-touch holder sized to the card's thickness (35 pt for standard cards). Use semi-rigid card savers for grading submissions, side-loading binders with acid-free, PVC-free pages for collections, and store everything cool, dry and out of direct sunlight.
Card condition decides value, and most damage is preventable. The right supplies cost a fraction of the cards they protect. Here is what to use and when.
The protection layers
1. Penny sleeves
Thin, soft polypropylene sleeves. Every card worth keeping should go in one. They prevent scratches and fingerprints and are the first layer for everything below.
2. Perfect-fit (inner) sleeves
Tight sleeves that fit closely around the card, often used inside a second sleeve to seal against dust and moisture. Popular for playing decks and high-value cards.
3. Toploaders
Rigid plastic holders that keep cards flat. Slide in a sleeved card. Standard cards fit 35 pt toploaders; thicker cards need larger sizes.
4. Semi-rigid holders (card savers)
Flexible holders that grading companies prefer for submissions, because cards are easier to remove without damage.
5. Magnetic one-touch holders
Two-piece holders that close with magnets and fully enclose the card. They look clean on display, often block UV light, and are ideal for valuable cards. Match the holder’s pt size to the card.
Card thickness (pt) guide
| Card type | Typical holder |
|---|---|
| Standard trading and sports cards | 35 pt |
| Thicker cards and some chrome cards | 35 to 55 pt |
| Patch, relic and memorabilia cards | 75 to 130 pt |
| Very thick cards and booklets | 180 pt and up |
Check the card’s thickness with the manufacturer’s spec or a sizing guide, since too tight a holder can bend the card and too loose lets it slide.
Storing a collection
- Binders: use acid-free, PVC-free pages. Side-loading pages and zippered binders keep cards in and dust out. Avoid overstuffing pockets.
- Storage boxes: cardboard boxes made for cards are fine for bulk. Keep them upright and don’t pack them so tight that edges get crushed.
- Graded slabs: store them upright in slab boxes to avoid scratches on the plastic.
Environment
Cards are paper. Damage comes from:
- Humidity: causes warping and curling. Keep cards in a dry room, and consider silica gel packs in storage boxes.
- Heat: avoid attics, garages and cars.
- Sunlight and UV: fades ink and holo foil. Display away from windows, or use UV-blocking cases.
Handling
- Handle valuable cards by the edges, with clean, dry hands.
- Sleeve cards straight from the pack to avoid surface scratches.
- Never use rubber bands or stack bare cards.
Shipping cards
Sleeve the card, put it in a toploader, and seal the top with painter’s tape or a team bag so it can’t slide out. Sandwich it between cardboard and use a bubble mailer with tracking for anything valuable.
Common questions
What does 35pt mean on a toploader?
Pt (points) measures how thick a card the holder fits. 35 pt fits standard trading cards. Thicker cards, such as patch and memorabilia cards, need 55 pt, 75 pt, 100 pt or more.
Are toploaders or one-touch holders better?
Toploaders are cheap and good for storing and shipping. Magnetic one-touch holders seal the card fully and look better on display, so they suit high-value cards.
Are binders safe for cards?
Yes, if the pages are acid-free and PVC-free. Side-loading pages hold cards more securely than top-loading ones, and zippered binders keep dust out. Avoid ring binders that press dents into cards near the rings.
Should I put cards in a sleeve before a toploader?
Yes. Always sleeve a card before a toploader. Sliding a bare card into a toploader can scratch the surface and damage corners.