Material: plastic frame / stand, durable PET membranes. 
Frame size: 2.8"x2.8"x0.8" , clear membrane size: 2.3"x2.3". 
Plastic Stand for Displaying as seen in image.
Best for Coins 2" Diameter or less.
If there is a wrinkle on the membrane, you can smooth out it by using a hair dryer. 
Challenge coin not included.