I purchased this here, but it's a bit small for me, so I'm putting it up for sale. It's made of a medium-weight fabric on both the front and back, so I think it's quite sturdy even without interfacing. Size: Approximately 21cm (height) x 30cm (width) Gusset: Approximately 5.5cm Outer pocket: Yes Inner pocket: No How about using it as your everyday outing bag? This is a handmade item by an amateur, so please consider purchasing if you understand. It will be folded and sent in simple packaging via Nekopos. There are no smokers or pets.