I believe harp benches are higher than a piano bench. I have an adjustable bench for a grand piano and it will not go up high enough to use with my harp.It caused shoulder problems when I tried to use it. It’s important if you play the pedal harp to have your bench up high or you risk shoulder, hip and/or back problems. My bench is set at almost 22 inches high in back, 21″ in front. It slopes downward from back to front. I am 5’7″.
Check measurements carefully if you buy a bench not offered by the harp manufacturer. Someone can correct me if I am wrong on this,but I think Lyon-Healy and Salvi benches are the same. I don’t know what Ayoma, Venus or Camac offer for benches.
BTW, I just checked out the Virginia Harp Center website under “accessories.” They carry Lyon-Healy artist benchs, gig benches and other benches. The LH bench goes up to 22″, gig bench 23″.