what height size do you need? we have it 24inch and 30 inch height

yes they are available in 2s

As per industry Standard, you should get counter height 24"

Counter-height
A counter-height bar chair is commonly 23-28 inches from the floor to the seat (23- to 28-inch seat height). Pair counter-height bar chair with 35 to 37-inch table heights.

Bar-height
A bar-height bar stool is commonly 29-32 inches from the floor to the seat (29 to 32-inch seat height). Pair bar-height bar stools with 41 to 43-inch table heights.

Here is the link for 24" bar chairs

https://www.houzz.com/products/tradd-metal-and-wood-bistro-counter-stools-set-of-4-distressed-24-prvw-vr~90737241