Finially ordering my first onsie/baby grow

I'm finally ordering my first adult baby grow/onsie and not sure what size to get, I'm usually either a large or XL depending on the fit, I have no excess fat, probably around 7-8% body fat. The ones i al looking at are 100% cotton and states they're a tight fit. Would i be best off to go for the XL?


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I only have experience with Little for Big onesies, but I had to go for XL, when I've never had to buy anything bigger than a large.
Most places give exact measurements for their sizes, I'd recommend going with them, rather than what you usually get for clothes.