I will try to describe it in words.
Fold your sleeves until the part of the sleeve above the button
where there is something like a line touches the place where the
epaulette is placed.
Fold up the sleeve about 4 times, each fold is about 2 to 3
fingers... I have small fingers.
Fold until you cannot fold anymore and then bring down the side
with the button.
Very hard to describe in words... don't know whether anyone can
understand a not. 
