sometimes last year I altered this blouse from Innocent World:
It's super pretty and I like to wear it, but the sleeves were always a bit short (apparently a common problem with long-sleeved IW blouses...).
I took the cuffs apart and shortened the sleeves, so it became a short-sleeved blouse.
I used the lace and buttons from the old cuffs for the new ones. I feel much more comfortable wearing it now (I was wearing it here btw.)