measurements in inches				
Brand	Size	Front	Rear	Side
Adidas Bl wht stripes	30	9	9	1.75
Aqux multi	M	5.5	8	1.5
Aqux Blu Wht	M	6.5	7.5	1.5
Club Swim Red Euro	30	8.25	7.5	2
Tyr Navy wht piping	28	8	8	2
Seobean Yellow	S	8	6.75	1.25
Tyr Orage plaid Euro	28	8	8	2
Sporti Blu Water Polo	30	8.25	8.25	2
Seobean 27 logo	M	7.5	7	1.5
Seobean Green	S	7.5	5.5	1.25
Tyr Red Black	26	7.5	7	2.25
				
measurements in cm.				
Brand	Size	Front	Rear	Side
Adidas Bl wht stripes	30	23	23	4.4
Aqux multi	M	14	20	3.8
Aqux Blu Wht	M	17	19	3.8
Club Swim Red Euro	30	21	19	5.1
Tyr Navy wht piping	28	20	20	5.1
Seobean Yellow	S	20	17	3.2
Tyr Orage plaid Euro	28	20	20	5.1
Sporti Blu Water Polo	30	21	21	5.1
Seobean 27 logo	M	19	18	3.8
Seobean Green	S	19	14	3.2
Tyr Red Black	26	19	18	5.7
Front is top front to seam. Back is top back to seam. My experience is that I get full butt crack coverage if the sum of these two numbers is greater than 16 inches, or about 40 cm. Suits shorter than this show a little to a lot of butt crack. Based on these numbers, my skimpiest and most confining suit is the little green Seobean with the "T" on the front, but you knew that already 
Gotta love those Seobeans!
Sebbie