8 labels per sheet, 1″ × 7″. TrueBlock blockout labels are best — names underneath won't show through. Free template — grade the stickered papers automatically in the grader. Always print at 100% / Actual size, margins "None", no "fit to page".
No stickers? Students can write period and seat (e.g. "P3 S14") anywhere on the front page, top or bottom. Never hole-punch or notch sheets — feeders jam. If you slice off the name strip, have students write their info at the bottom.