The way Colin's jacket gaped at his neck always bothered me and I didn't know why.

Following the menswear guy (@dieworkwear) on Twitter (I will never call it X) helped me give it a name, it's called a collar gap. From what I understand of good tailoring, a collar should lie flat on the neck to give a more seamless look.

But sometimes in the entertainment world, they may sacrifice certain things for costume-y narrative or other reasons. The things you learn!

And so now, I can finally watch Colin and Penelope have this sweet dance................ and know I'm staring at a collar gap 🤪

This photo makes me feel like neither Thom Browne nor collar gaps are quite as big a deal as people think they are. 

This photo of Mr. Brown and his partner Andrew Bolton is from Vanity Fair’s 2015 Best Dressed list, couples section, and they do make a charming couple. Above statement notwithstanding, of course Thom Browne is a huge deal, as examined a good post at A Continuous Lean. But he does have a collar gap in his dinner jacket here, and while that may not be a huge deal, it is a bit unsightly and a lot unexpected on one of the most famous suit designers around these days. A jacket looks more smooth, together, and comfortable when the collar rests against your neck.

Signals of a Handmade Suit : Zero Collar Gap | Parisian Gentleman