This cleverly designed eyeglass case features a handy flex frame-simply squeeze to open the case and release to close it. The flex frame even includes special loops allowing you to attach a chain or hook the case inside a larger bag. This kit includes the pattern and metal flex frame needed to make the case. Finished Size: 3-1/2" x 7-3/4". Refill flex frames are also available (WBMZW6103).