Pentominoes Puzzle

This is a very intriguing puzzle made of 12 pieces that must fit perfectly in every one of the different sized frames. The 12 pieces are actually shaped like all of the 12 combinations you can make by arranging 5 equal squares next to each other. This puzzle may seem easy at first glance, but don't be deceived by it, as it actually poses a significant challenge. Good luck and i hope you will have fun solving this puzzle!