All I have is this little video screenshot, but this was the highest jump we did in my last lesson! It seemed really high at the time, and I was kinda nervous, but we got over it. XD How high do you think it is... 2'3''? 2'6'' maybe?
It's almost impossible to judge accurately by this picture but my first guess is about 2"6. Also, most standards start off their first hole at 18 in and go up in 3 inch increments. Looks like (but again, hard to tell) like it's about 4 holes up from the lowest, which would make it 2"6.