The zipper was too sharp so I removed the pull tab and replaced it with a drawstring tie. Haven't used the zip pocket yet but should fit for SIM cards when traveling.
Wally Micro Reversible Wallet Pull Tab Men's Accessories and Wallets, Card Cases & Money Organizers
53 Review
BRASS TACKS Leathercraft Handmade Blocking Men's Accessories and Wallets, Card Cases & Money Organizers
89 Review
Royce Leather Mens Business Green Men's Accessories in Wallets, Card Cases & Money Organizers
62 Review
Maxpedition BRK π³ MX218F Gear Micro Wallet
68 Review