There's no single standard, but the most common heights for bar stools are 30 inches and 24 inches (seat height).
Most common height 30".
A counter stool is generally shorter than a bar stool, as a counter will have a lower height than a bar will. A normal counter stool for a kitchen will be around 24-26 inches, in order to meet the height of an average kitchen counter.
Standard bar stools are 30 inches and smaller counter stools are usually 24 inches. They make bar stools in different sizes but those are the standards.
Standard bar height is 42 inches. Standard counter for a breakfast bar is 36 inches. Typically you want about 12 inches of clearance for your legs. Standard bar stool height is therefore 30 inches and standard counter stool height is 24 inches.
The standard height for a tall bar stool is around 40 to 43 inches. There has to be at least 8 to 12 inches of space between the top of the seat and the underside of the table or counter. This website has some information on different heights: http://www.comfortable-bar-stools.com/tall-bar-stools.html
acc to anthrows it starts from 32"-36"..standard ..rest varies upon the design
"Lengths can vary in bar stools, but for comfort the average height is right about 3 feet. This allows patrons to either sit comfortable or lean against the bar stool while conversing with their friends."
The height for a counter height stool will vary. However most of them aveage at a height around 30". Some may also vary at a height of 24-26". Basically it will depend on where you purchase them and the brand that you are interested in.
A chairs seat is generally 11" shorter than the height of the tabletop. In your case you would need a 25" chair. luckily for you this is the 36" is the architectural standard for counter tops so all companies make a "counter height" stool with a seat height of 25". Bar Height: 42" Bar Stool: 31" seat h. Counter Height: 36" Counter Stool: 25" seat h. Table: 28-29" Dining Chair 17-18"h.
The height of a bar stool depends on the height of the counter. Today, many kitchens are equipped with islands with breakfast bars of varying heights. Bar stools are available in heights of 30 inches and 34 inches, as well as an extra tall 36 inches, which would be the standard height of the tall tables you sometimes see in cocktail lounges and the bar area of some restaurants.
Pub height refers to tables and is considered to be 36" high and is sometimes called couunter height also. Bar height tables are usually 42" high. A pub or counter height stool, would be 24" high from the floor to the top of the seat. A bar height seat would be 30" from floor to top of the seat. Hope this helps.
It's all about you and your comfort. You need to get whatever stool will work in this situation. If this is a bar stool then that is what it will be.