Vases are all sized differently. I've included a height dimension as well as whether it's small, medium, or large in my opinion.
Small are usually closer to bud vases (3-5" tall)
Medium are usually short or narrow (6-8" tall)
Large are usually taller or wider (8.5 - 11")
These are all estimates. If you would like exact measurements or vases with comparison to another object, let me know!