Super simple to make- I do a clutch that's 9x5 1/2" and then make a D ring tab for the wrist strap so it's detachable. I love these as they use little fabric and my bits of batting leftover from quilt making. Use it up! That's my motto Yo.
This was my first time using Soft and Stable interfacing too--that stuff is pretty amazing! Like a foam pad in between the layers -so it's stiff enough to hold the bag up on its own but not a nightmare to sew like s o m e interfacing that I won't mention by name but its initials are Pellon Peltex.