Final answer:
The size of the fillet weld specified on the arrow side of the joint is 1/4 in.
Step-by-step explanation:
The size of the fillet weld specified on the arrow side of the joint in the welding symbol below is 1/4 in. A fillet weld is a triangular-shaped weld that joins two pieces of metal at a right angle. It is typically used in lap joints, T-joints, and corner joints, as shown in the symbol. The arrow side of the joint indicates the side on which the weld is to be applied.