MATCHING PRE-CUT SIZE8.66 X 22 inch for each piece, The size fits most internal stairs and the quantity meets the needs of most families. Even if your step size is a bit special, you can easily cut the carpet tread with scissors. Increases grip and grip on steps and floors from: hardwood, wood, concrete, marble, tiles, vinyl, metal, laminate.Easy to clean and quick drying. LUMINOUS PATTERN DESIGNIt adds interest and beauty, and in a dimly lit room you won't fall down because you can't see the stairs. The stair carpet encourages your children, dogs and cats to use the stairs without having to take care of slippery wooden steps with their non-slip properties. EASY INSTALLATION AND CLEANINGJust remove the transparent back and attach it to stairs. Carpet stair runners are dirt repellent in most cases. Just throw them in the washing machine if they get dirty, or just use the vacuum cleaner to remove the dust. Soon the non-slip stairs will look like new Do not shrink or deform. ANTI-MOVEMENT SOLUTIONOur mats are equipped with an "Anti-Moving & Slipping" surface that covers the entire back of the tread to make you despair before your hard assembly work. The anti-moving back is gentle while retaining its utmost effectiveness, so you can easily remove the treads at any time (and put them back) without having to worry about leaving residue on your wooden staircase. PLEASE NOTEOur back is not an adhesive or a permanent adhesive like double-sided tape. When touching the glue with your hands, there is no stickiness to be felt, but it sticks to the stairs. The place where the stair mat is laid should be kept clean and dry, free of dust, water stains, particles and a smooth surface.Can be machine washed, washed by hand, vacuumed and not exposed to the sun.