Approx W 12 x H 13.5 with 2 inches box bottom.
this is not interfaced as the canvas is sturdy with a slight flop, it is lined with 100% cotton inside. This bag also has an inside pocket to store your notions with your project and is a great size for the medium size projects ( shawls or small human garment). There is a key ring handle inside to clip on other items so it's easier to find them.
This is a drawstring closure.