Classic yet contemporary black base holds calendar refills with a 3 x 3.75 inch page size; base itself measures 4.88 x 6.63 x .88 inches</br>Holds standard loose-leaf calendar pages?? E919-50 (3.5 x 6"?? sold separately</br>Black base is made of high-impact molded plastic; two-ring binding; recyclable</br></br>Product Description</br></br>Two rings lock in a looseleaf calendar refill. Size: 3 x 3 3/4 Color: Black Material: Molded Plastic.</br><br/>http://www.amazon.com/gp/product/B00006IAX22