I LOVE wearing thigh highs that stay up all day without sliding down, and these are the best! The attractive lace top bands have 2 generous width bands of silicone on them that do just what they are supposed to do - grip and hold up. The bands lay smooth and flat on upper thighs fitting and feeling great. Even the top scalloped design edge of the bands lay smooth and flat without curling up - nice! The material of the legs themselves is very smooth, soft, lightweight, and delicate feeling yet they wear well with durability and snag-free (so far) smoothness. They look great with a very light sheen that is attractive. The transparency is just right with a natural look and just enough opacity to mute out and soften the look of any skin blemishes underneath which is flattering. I am 6'-0" and weigh 140 pounds so I am right at the transition point between size CD and GH according to the sizing chart. So, I bought a pair of each size to find out what fits best. Both pair are good fits for my long legs with plenty of leeway and they both feel and fit very comfortably. The big difference between CD and GH is in the girth of the lace top bands - there is a big difference in circumference of the bands with the GH being appreciably larger than the CD, requiring the band to be pulled up much higher on my thigh almost to my crotch to be stretched out enough to have adequate grip to hold up, which it did. The CD is smaller and it goes up about half way up my thigh to stretch and grip, which it does very well. I think CD is right for average thickness thighs and GH is for much heavier and larger thighs. I got one pair in "Little Color" and the other in "Barely There" and I like the "Little Color" better as it is very natural and skin (at least mine) colored. The "Barely There" is a little darker with a light brown cast - it is like a Suntan look which is desirable if that is the look you want. Bottom line is these are the very best thigh highs I have worn at any price and they are real keepers. They really are silky sheer, smooth, very soft to the touch, and sexy. Perfect!