The procedure is very painful and there is a limit to how much they can do because
since there not doing the bottom and upper bone, there will be problems if they make
one much longer than the other. So, they may make you up to 3 inch taller, but that's
a lot of risks and pain for that.
The smaller you are, the smaller the number of inch they can
make you go up without looking weird and impacting locomotion.
So, someone 4 foot 10 could be made 5 foot tall, but
someone 5 foot 3 could probably be made 5 foot 6.
This procedure cannot make you tall, at best it can take you inside
the 5 foot 8 and more, average male range (the average is 5 foot 10 with a
2 inch standard deviation around it). So, if you're 5 foot 5 and less,
it won't make you close to average height for a male.