These stainless steel molds for fused glass can be made to vitally any size you would like and come oversized by 1/4" to allow for 1/8" fibre paper to be used with them on the inside.  Made in the USA from 16 gauge stainless steel and allows quicker set up in the kiln and infinite reuse of the molds and repeatable sizes every time without having to build a new dam each time.   
 
Please feel free to contact me with your desired size, the cost is $1.30 per square inch shipped  with a minimum of $35.  I can also make them deeper or shorter depending  as welll as many other shapes and sizes,  Don't be afraid to ask, I am happy to make something just for you.   
 
I can also make many other shapes such and triangles, snowmen, crescents, etc.