Tall men's tops use a 'T' suffix: MT, LT, XLT, XXLT. The body length is 2" longer and sleeves 1.5" longer than the standard cut.
Tall pants use longer inseams: 34", 36", 38". For men over 6'2", a 34" inseam is usually the minimum.
Best brands for tall men: ASOS Tall, J.Crew Tall, Banana Republic Tall, Bonobos, American Tall.
Avoid brands without dedicated tall lines (most fast fashion). The standard 32" inseam will hit above your ankle.
Suit jackets: look for L (long) or XL (extra long) length codes. A 42L is for men 6'1"–6'4".