Outer dimensions are approximately
The square frame is: 3 1/2" x 3 3/4"
The middle round frame is: 2 3/4" diameter
The inner floral/round frame is: 1 3/4" diameter
Inner dimensions are approximately
The square frame is: 3" x 3 3/8"
The middle round frame is: 2" diameter
The inner floral/round frame is: 1 3/8" diameter