The Current
Choose a wetsuit from the exact model's size chart and your current measurements. Check chest, waist, hips and height along with torso and limb proportions. Normal breathing, movement and a close fit matter more than the size printed on your clothes.
Wetsuit entry gets easier when size, proportions, lining and zipper layout suit the diver. Seat the suit in stages without pulling aggressively on seams. A thin liner can help skin friction, but persistent restriction calls for a different fit.
Big and tall are different fit requirements. A tall diver may need torso and limb length while a broader diver needs room through the chest, waist or hips. Compare both proportion and circumference before choosing exposure protection.
A plus-size wetsuit should follow your body closely without restricting a normal breath, shoulder movement or the equipment skills you need. Compare the exact chart with fresh measurements and seat the legs and torso fully before judging fit.
XXL varies between scuba brands and even between models. Measure your chest, waist, hips and torso, then use the chart for the exact suit. Extra length or width in the wrong place can leave a larger size less comfortable.