Any guy this ripped has to just paint himself green and go as Hulk. Few pull it off like this guy does though! (Is that real? I don’t see a muscle-suit) With the green body paint and sweats this might be the cheapest custom-costume if you can pull it off.
For us mere mortals, thankfully there are options to fake a Hulkian-physique. Here is a nice one for adults and one for kids here.
Here is a classic Spiderman cosplay. Complete with the perfect pose! Another great look for those who don’t want to be recognized. That could be the POTUS in that costume.
Here is the best version that I saw to buy if you’re looking for a classic look this Halloween: here. For your little one, here.