Egyptian microfiber, really?

I'm not sure about the microfiber, however, these are the softest most comfortable sheets I have ever slept in.

Hello, I purchased a set of these sheets and the top sheet is not for a queen - I measured the sheet and it's 75" wide, which is for a full size -

The queen size sheets I ordered, fit my queen size bed, so I can't understand why they wouldn't fit yours. I know with King size beds, they have what is called a California King, (which are bigger then normal Kings), so maybe your queen size bed is that type. Most of the new mattresses require what is called deep pocket sheets. When we first purchased our bed, we purchased sheets for a queen and they didn't fit due to not being deep pocket sheets.

Are they 100% cotton?

I could not find a tag on them - and as soon as i felt them i was " hey they DON"T say 100% cotton on the outside package- so shame on me." Feels like a blend of things- very thin fabric and soft. Will give them a few usees to see if i buy other colors etc. these are not 100% cotton.

is the Queen top sheet really 90x102? I've sent two sets (different brand) back because they were much smaller than advertised.

I have 3 pair--and all 3 are sized slightly different. I have one set that is perfect, and of the other two, one top flat sheet is just almost too small for the bed while the matching fitted sheet is far too loose on the queen bed, the other set has a fitted sheet that is far too small. I think it is the luck of the draw what you get. They must be made by different manufacturers for the same seller. I have one set that the material itself is an entirely different quality than the other two as well. I have grey, light blue, and the brown. The grey is the only set that fits perfectly with a large enough top sheet.