H&M dinosaur zip up hoodie, spring jacket

Dinosaur, zippered, grey, light-weight cotton material, only worn 2 times, got mud on one side, washed out right away, has some minor but unnoticeable discoloration (see pics). Last pic shows size comparison are similar, one is 6-8yrs the other is 4-6yrs. Which is good for little boys between 4-7 years. My son is petite 7 year old and they still fit, but look tight.