So I found this on the web and though it might be helpful when people are making themselves into pegasi (sorry it wouldn't let me post the picture):

Horse height: Human equivalent:

19.0hh 6'4

18.3hh 6'3

18.2hh 6'2

18.1hh 6'1

18.0hh 6'0

17.3hh 5'11

17.2hh 5'10

17.1hh 5'9

17.0hh 5'8

16.3hh 5'7

16.2hh 5'6

16.1hh 5'5

16.0hh 5'4

15.3hh 5'3

15.2hh 5'2

15.1hh 5'1

15.0hh 5'0

14.3hh 4'11

14.2hh 4'10

14.1hh 4'9

14.0hh 4'8

13.3hh 4'7

13.2hh 4'6

13.1hh 4'5

13.0hh 4'4

(p.s. the horse/pony cut off is 14'2hh)