Base 3-1/4 inches. Fits 8-12 cup coffee makers. Real savings. Highest quality. Everyday. Great products at a price you'll love - that's Essential Everyday. Our goal is to provide the products your family wants, at a substantial savings versus comparable brands. We're so confident that you'll love Essential Everyday, we stand behind our products with a 100% satisfaction guarantee. Essential Everyday coffee filters virtually eliminate unwanted sediments and coffee oils. Essential Everyday basket filters are steam formed for easy separation. If you're not completely satisfied with this product, please contact us at www.Essentialeveryday.com or 1-877-932-7948. To minimize absorption of cooking odors, keep filters in closed container in drawer or cabinet. Fits: Mr. Coffee, Proctor Silex, Black & Decker, West Bend, Bunn, Hamilton Beach, Norelco, Regal Ware & Farberware and most other home basket coffee makers. Product of USA.