I'm a -very- tall man (6'6").  and all my height is from the waist up so that even extra tall mens t-shirts are too short, coming untucked.  Especially if they shrink at all during repeated laundering. They would also start strangling me in the arm pit or get really droopy in the neck...or all three problems at the same time.

Several years ago this item caught my attention because they go well down on to the thighs of women, almost to their knees.  So I tried a couple and they solved my problem.  There was a little shrinkage after repeated washings, but nothing out of the ordinary, and they still stay tucked in.

I was so pleased So I replaced all my undershirts with these, enough for a two week laundry cycle.  What I didn't expect was how well these hold up.  They are a bit heavier cotton and didn't wash thin as quickly as regular undershirts.  I've been able to wear the same undershirts for 5 years without replacing. And that's wearing them daily for 7-8 months of the year.  They kept their shape.  They stayed thick enough to be useful for keeping warm in normal winter weather.  And the whole 5 years I have never once felt like my arm pits were being choked, and the neck didn't get sloppy

They might be a bit more expensive than a standard package of mens undershirts.  But for my money they are worth it.