Dear Carol Healy, with the straight frame it is possible to embroidery shoes up to size 38. The left and right frame allow sizes up to 44. Of course, we are talking about european shoe sizes.
Dear Apun Ujjin, the frame is called clamp frame. There are two Clamp frame sets available. One includes the mounting arm and forward facing clamp frame, the other includes left and right 45 degree frames (excludes mounting arm).