This really is a delightful little brush. Despite being quite a soft brush, the low loft size enables it to be a very effective soap/face lathering performer. It's just a little too small for my liking.I measured the knot size at the base but it seems a very small head compared with other 20mm knot brushes. Looks very much like the Vulfix 374 but slightly different dimensions. Well worth a look on a visit to T&H.