Measure Yourself up head to toes, take that full lenght in black twine / yarn and tie it around some hair of Yours.
While doing so say something along the lines :
"As this hair shall grow no more
neither will N.N. get more tall"
Put all of that in freezer in some ice tray or mold , ice bags or what You have and leave it there. To be done on waning Moon.
Now even though I gave the spell I will advise You against it strongly and agree with what fellows have said
When and IF You would like to reverse the spell You could melt the ice , unbind the cord saying :
Relesase the bind, with no ill nor wrath
let the grow once again take natural path
or soemthing alike.