The history of the putter design has been rich with diversity over the past 200 years. The United States Golf Association has embraced this diversity in the design of the putter. It has made special rules and exceptions to rules which allow putters to have different characteristics from all other clubs. The USGA not only allows great diversity in putters, it even allows putters to be adjustable.

The two primary rules which apply to the design of putters are Rule 4-1 and Appendix II. Rule 4-1 is the general rule regarding the form and make of all clubs, including the putter.
Appendix II gives much more detail with regard to design limitations for golf clubs. REESO putters conform to all USGA rules.
Under Appendix II, 4.1a(iii), REESO putters give the golfer maximum adjustability for putters within the USGA rules.
Each REESO Putter Instruction Manual includes a copy of the current letters of conformity from the USGA for our Conventional, Mid/Belly, Long Putter and Adjustable Shaft designs

The USGA rules also address the issue of the putting stroke itself. Rule 16-1(e) states that, "The player shall not make a stroke on the putting green from a stance astride, or with either foot touching the line of the putt or an extension of that line behind the ball."
You may take any type of putting stance you like so long as your feet are not straddling the imaginary line running from the cup to the ball and beyond.
The Long, Side Saddle and Face-On putting styles we refer to on the REESO Putters web site conform to USGA Rule 16-1(e).