I use 1/4" thick acrylic for the "glass" and the wood of your choice.  Listed are the standard sizes I make, however, I can make any size you desire.  Other options include orientation (long or tall), which corner will have the flag, and your choice of backgrounds.  I have in stock Navy blue felt and duck cloth, and black felt and duck cloth.  I am open to any ideas and most requests.  Thanks for looking...