Help me chose a swimmsuit - I have no waistline

[decaman]

I'd like a new swimsuit for the summer (for splashing about in, not for lengths) - do you have any recommendations of one which will make me look like I have a waistline? My underbust & waist measurements are pretty much the same & I'm fairly flatchested. I have wide shoulders, so overall, it's not a great look. I'd prefer a tankini top, but I'm open to suggestions. I've bf 2 DC, so I need all the 'support' I can get!

[Oly5]

M&S swimwear is amazing
I find their supportive stuff brilliant
Check out the full range
www.marksandspencer.com/secret-slimming-ruched-front-tankini-top/p/p22427814?prevPage=plp