Reddit reviews Stirrup Style Loop Shirt Stays, Black Military Adjustable Elastic Shirtstay, 2 Pack (1 Pair) by Army Universe

Get the stirrup kind. Never once slipped or broken on me.

Military Garter Straps

Maybe the Air Force is just lazy, I never learned how to do the military tuck, what we did do however was buy straps that will keep the shirts tucked. I prefer the ones that goes through the foot the on that attached to the bottom of the shirt and sock has the tendency of coming undone at the socks and going upwards.

I am using these shirt stays. They are long enough to work just fine on me (I'm 6'6").

A lot of the Amazon reviews are pretty negative. I can only assume those negative reviews are for the clip style stays, not the stirrup style stays. No complaints from me.

Haven't tried any of the "belt" styled shirt stays but far as the "clip-on" styled shirt stays are concerned, the stirrup style is definitely better than the straight and Y style shirt stays.

http://www.amazon.com/Black-Military-Stirrup-Style-Shirt/dp/B0037J37RO

Googled shirt stays, first link.