I ordered the non-perforated gloves in XL, and am very impressed with the quality of construction and materials. I would definitely recommend this product. However, the size does run large if you follow the sizing chart shown in the product pictures. The smallest part of the palm of my hand measures 4 5/8". I ordered the XL, and wish I would have gone with the LARGE. I tend to waffle back and forth between L and XL depending on the glove, and in many cases have trouble getting my hand into gloves, but this one is definitely generously sized and we all know leather stretches. Next time I'll know!
For what it's worth, I also am the proud owner of several (at least 5) bikerhelmets.com Helmets. I wear a XXL, and absolutely love the fit and feel.