It honestly depends which season black 15.5 your comparing too. I find every season the denim sizes fluctuate. Going TTS or sizing up 1 doesn't make that much of a difference for 15.5cm IMO
Saint Laurent Paris - Official Thread. - Page 118
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Prior season crash and destroyed denim is 14.5 cm if I'm not mistaken. The general opinion is that they fit pretty snug overall.
Current season crash and destroyed is 15cm so once again it will fit snugly. The plain black 15.5cm and even the current 15 cm biker denim I find fits more loosely than the other SLP denim in the same cut. You could stay TTS, although the denim will be a bit more tight than your 15.5s.
In the black 15.5s I find I have to size down one to be fair.
I bought my black denim 15.5 off Mr. Porter around January, so I don't really know the seasonal details. I'm going to guess its AW13.
Truly depends on your style, but I actually like that jacket. Mind sharing a link?
Anyone know what I can search to find a few product pages? Been trying Saint Laurent plaid jacket with mild success...
Edited by Somatic - 7/23/14 at 3:45pm