I had switched out a 2004 brand new Kate Spade calendar refill that’s still in there untouched. It has telephone/address tabs, and sheets (from original Flavia calendar). Uses Size 3, 6 ring standard refills. Has a ruler/ page marker. Also 3 slots for credit/business cards, plus one clear for your own ID. Additionally has a slot for a memo pad in the back as well as a pen holder. This is a beautiful piece in excellent condition.