Count what goes in the envelope. The calculator adds up typical weights, says whether it ships as a letter or a package, and gives the stamped-letter price from the same USPS table our label generator uses. Weigh the real thing before you mail; these are typical weights.
Typical weights
| Item | About | Where the number comes from |
|---|---|---|
| One standard card | 1.8 g | PokemonDB: how much do Pokémon cards weigh (1.7 to 1.8 g) |
| Penny sleeve | 0.6 g | Faire: 100 penny sleeves listed at 58.97 g |
| Toploader (3″ × 4″) | 7.3 g | BCW: 100 toploaders + 100 sleeves listed at 1.74 lb, less one sleeve |
| #10 envelope | 5 g | Business Source #10 envelopes, 100 listed at 1.16 lb |
Letter limits and prices: USPS Notice 123 (price list). Count stamps with the stamp calculator, and check whether the order needs tracking with PWE or tracked?
FAQ
How much does one trading card weigh?
About 1.7 to 1.8 grams for a standard card, a little more for some foils (PokemonDB: how much do Pokémon cards weigh (1.7 to 1.8 g)). Weigh your own when it matters: a kitchen scale is accurate enough.
How many cards can I mail as a letter?
A letter can weigh up to 3.5 oz (about 99 g) and be up to 1/4 inch thick (USPS Notice 123 (price list)). In a #10 envelope with penny sleeves that is roughly 40 cards by weight, but thickness usually runs out first.
Why does a toploader cost more?
A toploader makes the envelope rigid. USPS charges the nonmachinable surcharge on rigid letters, which turns a $0.82 letter into $1.31.
Sources
- PokemonDB: how much do Pokémon cards weigh (1.7 to 1.8 g) (checked October 24, 2026)
- Faire: 100 penny sleeves listed at 58.97 g (checked October 24, 2026)
- BCW: 100 toploaders + 100 sleeves listed at 1.74 lb (checked October 24, 2026)
- Business Source #10 envelopes, 100 listed at 1.16 lb (checked October 24, 2026)
- USPS Notice 123 (price list) (checked October 24, 2026)
- USPS Postage Price Calculator (checked October 24, 2026)