K-KEEP [A4 Plus] [1.5-inch] Binder - Compact Version! Compatible Refills: Meowcafe K-KEEP A4 Premium Binder Refills. K-KEEP [A4 Plus] [1.5 inch] Beginner Friendly "Compact Binder" - "Light Weight" - "Shelf Efficient": 2 inch Spine. 1.5 inch Ring. - Good Size for Beginner Collector or new Collection (small to medium size). - "Compact" does not mean small capacity, the 1.5 inch D-Ring is still 50% more capacity compared to common 1 inch A4 Sized binder - The A4 Size is Extremely useful as a trading binder to bring both your photocard and your large inclusions.