How tall should a bar or counter stool be? Slide the seat and see

A stool can have the right look and the wrong height, leaving your knees jammed under the worktop or your elbows reaching up for the surface. The number that decides it is the gap between the seat and the top of the counter, usually about 25–30 cm.

Drag the counter height, worktop thickness and stool seat height, watch a seated person fit or not, and see a plain verdict. You'll get typical heights, how to measure your own counter and stool, and cheap fixes before you buy anything.