Fine tune your putting stroke at home or office with the Odyssey Mini B-Square putting mat! B-Square teaches how to hit a perfect putt and portable putt cup can also be used on real putting green. Make more putts with a perfectly square face. B-Square teaches you how to hit a perfect putt. Works with both arc and straight back/thru putting styles. It can be set for 2 ft., 4 ft., or 6 ft. lengths and the putt cup is 0.5 in. smaller than regulation to help sharpen aim.