External Dimensions: L 20" x 14" D x 15" H (with lid)
Internal Dimensions: L 19" x D 13" x H 10" (without lid. Lid gives another 5" of clearance)
The hinges are broken so the lid is not affixed to the base. Technically you can get a replacement part for that: https://www.oldcolemanparts.com/parts/Cooler-Parts/Cooler-Hinges-C45.html But lets be honest, why you bother for a $20 cooler? Aside from the hinges, cooler's is just fine.