Berkeley have this beautiful Adjustable Artist Bench is
A True Artist Bench.....when the bench is in a raised position you can let your kids in perfect position.
This bench has a Compartment to store your sheet music
Superior black vinyl Diamond Tufted top leather and Black Satin Polish finish come with Professional Tapered Legs
Seat Measures: 38" wide x 15" depth.
Height adjustment from 18" to 22" high.

i have one of this bench in my house. i can feel much comfortable then before when i don't have this chair. that way can help me play much longer time. if you buy one and try it, then you know how i feel.