Baseboards are the moulding or trim that covers the seam between the floor and wall. There are several baseboard styles, including beaded, ornate, smooth, square, curved, and more. Baseboards can also be a variety of colors, sizes, and heights. Baseboards might seem like a minor detail, but your baseboard plays a significant role in how your room looks. The types of baseboards you use can give your space a new look or tie a design together.