My hourglass dulcimer size, does this sound about right ?

Hi Everyone

I have a quick question, Im putting together my first made from scratch hourglass dulcimer.

I have the sides glued to the scroll head and tail block, this is the size of the body, not counting the scroll head. 30 long, 6 wide at lower bout, 3 at the waist and 5 at the upper bout.

Does this sound about right ?

Thanks

Ron