UA Coldgear baselayer for less than a tenner (+p&p) at Sports Direct

How do these come up size wise. I wear a large in polo shirts (adidas, IJP, nike) I have a couple of the cheap Dunlop ones and had to go to an xxl 😱
 
How do these come up size wise. I wear a large in polo shirts (adidas, IJP, nike) I have a couple of the cheap Dunlop ones and had to go to an xxl 😱

If you are large in IJP then I would go a size up for the UA base layer
 
I've always bought the same size in baselayer as I buy in tops.

Can't see the point in going up in sizing, they are supposed to be tight, that's kinda the point. if your going up in sizing to make them more comfortable (because you don't the the tightness) then you probably shouldn't be using performance base layers, you'd be better off with simple thermals.
 
My suggestion wasnt a case of going up in size - more to do with the difference in the manufacturers sizing

I wear IJP in medium in all tops but in UA and Adidas baselayers wear large
 
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