Our Cherry Blossoms on Blue Frames are in a size Medium frame. There are 16 small acrylic cherry blossoms attached to each pair. The sunglasses are made of plastic. The lenses are actual sunglass lenses with a rating of UV 400 against UVA and UVB. Click here to see the actual measurements of this pair to make sure they will work for your pet. There is a clear jewelry cord tied to the end pieces to keep the glasses in place. The glasses measure 5 inches by 1 1/4" inches.