Queen flat sheets are commonly about 94 inches wide by 102 inches long (many listings show flat sheets around 94" x 102").
Care directions are generally machine wash and tumble dry. Many listings specify machine wash warm or cold and tumble dry low, with instructions such as do not bleach or do not dry clean on some sets.
Most gray sheet sets are made from 100% cotton (in percale, sateen, or flannel constructions), while some sets use microfiber (100% polyester).
Most gray sheet sets include a flat sheet, a fitted sheet and one or two pillowcases—twin sets commonly include one pillowcase, while full/queen/king sets usually include two.