Standard, or conventional, length is the most popular and is the length that beginners should start with. Lengths: Standard-length putters, often referred to as 'conventional putters,' range from around 32 to 36 inches long, from one end to the other.Mallets come in a variety of shapes and sizes, some very large and quite unusual.
Mallet putters have large clubheads that maximize that forgiveness of poor contact. Heel-toe putters have the same general shape as blades, but with extra weight at the heel and toe to add perimeter weighting, and with other design tricks to help make the clubs more 'forgiving' on mishits. A traditional blade is narrow and shallow, typically with the shaft entering at the heel (although sometimes center-shafted).