A golf club head having an insert forming a window through the golf club head is described. The golf club head has upper and lower surfaces. The golf club head includes a body with a heel, a toe, a front portion with a striking face, and a back portion. The front portion of the body forms a striking face. The body includes an aperture extending from the upper surface to the lower surface and extending from the front portion to an inside portion of the back portion. An insert is secured within the aperture. An indicia within the insert is visible from the upper and lower surfaces of the golf club head.