AeromaxJr. Train Engineer Suit with Cap and Accessories

does the 18 mo size include gloves? I am thinking maybe I should go with the size 2-3, so he can get some use out of it

The size says XS, can you tell me what age this is for?

Is the hat adjustable

Is the small good for a 3 month old that fits in 6-9 clothes? I have a chunky baby who barely fits in 6-9 month clothes