Golf clubs and golf club heads

Abstract: Wood-type golf clubs and/or golf club heads include a club head body having a breadth to length ratio of at least 0.9, optionally a club head volume of at least 450 cubic centimeters, and a diagonal dimension of at least 75% of a theoretical maximum diagonal dimension (as measured along a diagonal of a bounding box enclosing the club head body and defined by the length dimension and the breadth dimension). In some examples, the diagonal dimension may be at least 80%, 85%, or even 90% of the theoretical maximum diagonal dimension. Additionally or alternatively, if desired, at least one horizontal cross section of the club head body will enclose or encompass an area of at least 0.8×BL, at least 0.85×BL, at least 0.9×BL, or even at least 0.95×BL. (end of abstract)