The Humpback Whale jumper is mostly constructed in parts, a back, front, tail and details are all made separately and sewn together.   The hood and the arms are worked off the jumper as it is constructed.    I knew that I wanted the back of the jumper to be grey, and the front white with the lines you get on the front of a humpback whale.   The hood needed to have blow holes and eyes, and the back needed the hump, whilst the sleeves needed to double up as whale flippers.

The pattern is worked in Aldi So Crafty Aran yarn, but any aran/worsted weight yarn should work. I used 375g of grey, 150g of white and a very small amount of dark grey for the details.

I have only worked this pattern up in age 5-6, however, it is fairly easily adaptable.   You could add or subtract stitches and rows to the front and back panels to make the jumper smaller or larger.   The sleeves would work in the same way, as would the hood.   All the details should be able to remain the same.