The Cardprotector holds 4-6 cards depending on how many cards have embossed lettering. If your cards have embossing, it holds 4 cards – if none of your cards have embossing, it holds 6 cards.
Each Secrid leather wallet - Miniwallet, Slimwallet and Twinwallet - has the Cardprotector integrated (Twinwallet has two Cardprotecors). In addition, the leather exterior of these wallets allows extra space for cards, cash and receipts. Miniwallet and Twinwallet provide space for at least 4 extra cards. Slimwallet has a wider cut and provides space for at least 6 cards.
Max card capacity summary:
Cardprotector: 4-6
Miniwallet: 8-10
Slimwallet: 10-12
Twinwallet: 12-16