Bed sheets were traditionally white, but now various colors and patterns are used. The feature of bed sheets is often conveyed by the thread count - the sign of threads per ethical inch of material. In general, the institute the thread count, the softer the sheet, but the weave and type of thread may affect the "hand" of the material so that a sheet with a lower thread count may cert be softer than specific with a higher count.
Usually a empty bed sheet is overlocked around the edges to mode four seams. Lone of the seams is wider than the other three and helps with orienting the sheet correctly on the mattress. The wider seam goes at the head end of the mattress. Sometimes the sides do not have Kids Bedding seams, but are finished with the selvedge only.