What Size Inner Sleeve Do You Need? Perfect Fit vs Perfect Mini
By KMC Sleeves USA | Published: 2026-10-18
Category: How-to Guides
Choose the right inner sleeve: Perfect Fit for standard cards, Perfect Mini for mini cards. This guide helps you match your deck size and avoid common mistakes.
Quick answer
Choose KMC Perfect Fit for standard-sized cards and Perfect Mini for mini-sized cards. Both are top-loading inner sleeves designed for double sleeving.
Why size matters for inner sleeves
Using the wrong inner sleeve can cause your cards to shift, bend, or get damaged inside an outer sleeve. Perfect Fit and Perfect Mini are both thin, clear sleeves that load from the top, but they are sized for different card dimensions.
The key difference is the card size: standard trading cards (like Magic: The Gathering or Pokémon) use Perfect Fit, while mini-sized cards (often used in board games or specific TCGs) need Perfect Mini. Mixing them up leads to poor fit and reduced protection.
How to choose your inner sleeve size
- Identify your card size: Measure your card. Standard trading cards are roughly 2.5" x 3.5" (63mm x 88mm). Mini cards vary by game but are smaller—typically around 1.5" x 2.5" or similar. If you're unsure, check the game's official dimensions. Common mistake: assuming all cards are standard size. Always verify before buying.
- Match the inner sleeve to the card size: For standard cards, choose Perfect Fit (product ID 603668). For mini cards, choose Perfect Mini (product ID 603664). Both load from the top and are designed to be used inside a corresponding KMC outer sleeve. Do not use Perfect Mini for standard cards—they will be too tight and may damage the card edges.
- Double sleeve with the correct outer sleeve: After inserting your card into the inner sleeve, slide it into a KMC outer sleeve. Perfect Fit works with all KMC Standard sleeves; Perfect Mini fits inside all KMC Mini sleeves. This two-layer system provides dust and scratch protection. Checkpoint: Ensure the outer sleeve matches the inner sleeve size (Standard vs Mini). Mixing sizes will not provide a secure fit.
Product facts
- Perfect Fit: KMC created the Topload perfect fit sleeve as the first step in ultimate protection for your valuable cards. Paired with any of our outer sleeves you can guarantee your deck is well protected. Perfect Fit is the go-to inner sleeve for standard cards, ensuring a snug fit inside all KMC Standard sleeves.
Perfect Fit - Perfect Mini: Thin, Clear sleeve that fits inside all KMC Mini sleeves. Use for Mini Cards, Loads from the Top. Perfect Mini is specifically designed for mini cards, preventing movement and dust inside outer sleeves.
Perfect Mini
