Overall size of this square-muffin pan is 11-1/4" x 15-7/8"

Fat Daddio's Heavy Duty Muffin Multi Pans

Built from 18 gauge anodized aluminum, the pans in Fat Daddio's muffin-pan series feature a rigid rolled rim that creates a durable pan. The anodized finish makes for even baking and easy release and cleanup.