Since WALL-E is still on the brain, I'd thought I'd make a compilation of the scenes where we see the BnL Vacation Suit (as I've dubbed it) on the Axiom, mainly for drawing reference.
So the "BnL Vacation Suit" we see is, by default, red, and can change color as long as it is linked to their social network.
The two main style variants are a male and female variant. The male variant has a zipper going down to the stomach, while the female variant's zipper only goes down the chest. Also the female's neck is slightly wider. Interestingly, the suits seen by the time WALL-E arrived have a pair of white stripes on the sleeves that are lacking in the Axiom commercial. Continuity goof or possible in-story redesign?
It can be assumed that since we see the suit both on passengers that first boarded the ship and...700 years later...the suit is probably designed with advanced fabric tech that allows it to expand not just weight-wise, but also height-wise. Children and adults are all wearing the suit, so maybe it grows with the wearer as they age as well, not just for the weight gain. Interestingly, they appear to have had shoes when they first boarded; maybe the shoes couldn't grow with the wearer like the suit did?
Aside from that, we do have two special variants. The babies wear a hooded onesie that covers the entire body (save for the face) and bears the logo on the stomach.
And then there's the Captain's suit, which is white with red accents (the zipper panel is rectangular instead of rounded at the end on the standard suit), and accessorized with a Captain's hat and coat; the latter of which only fit the first captain...maybe the second...since by the time we see it on McCrea, only the first button fits and it's worn as a cape instead.
Hope this helps any WALL-E fan artists and fanfic writers out there...in a world outside of Yonkers!