Crossbody bags are bought on a photograph of a panel and they die at a tab. Here is the order the questions should actually be asked in.

How is the strap tab stitched?

A bar-tacked box stitch spreads the load; a straight seam concentrates it into a line.

Ask whether the webbing wraps the ring or butts against it. Wrapping wins every time.

What is the hardware made of?

Steel and zinc alloy look identical and do not last the same length of time.

Welded rings cannot be pulled open. Split rings can, and eventually are.

What drop does the strap produce?

Drop, not length, is what you feel. Around 22 to 24 inches puts the bag on the hip.

A range quoted only as adjustable may never reach a comfortable drop on a tall wearer.

How wide is the strap?

Width is comfort. A narrow strap is a cutting edge under a loaded bag.

Thin round cords look best in photographs and are the fastest to become unbearable.

And check the panel before you design for it

Under seven inches wide, curved over a gusset, crossed by a zip. Design for that shape.