7/16" thick by 2 1/4" wide

• A. Three piece baseboard
• B. One piece baseboard
• C. Base shoe
• D. Two piece baseboard

Answer: (B)

These numbers describe a single molding profile, which is why it’s a one-piece baseboard. A baseboard this size—about 7/16 inch thick and 2 1/4 inches wide—is a common single-piece trim that runs along the wall to cover the gap between wall and floor. It’s a simple, continuous piece without separate cap or extra components.

Two-piece baseboards would involve a separate cap or additional piece to build up the profile, changing how thick or layered the trim appears. A base shoe is a much smaller, narrow molding used at the floor line to cover gaps and isn’t described by those dimensions. A three-piece baseboard would be assembled from multiple parts to form the profile, which again implies a different construction and size.