Yaqi say that their Ever Helpful 2 Band Badger has a 22mm knot and a loft of 47mm. The one I received actually has a 24mm knot and a loft of 43mm. No doubt it is a good looking handle and very ergonomic but the knot is a different matter. Now if you're looking for a compact 2 band badger knot with a ton of backbone in a small brush then boy is this the brush for you ! I call it the Tennis Ball and while it's not literally that firm you get the idea.
Below is a photo of it I took next to its bigger brother the Yaqi Obsidian 2 Band Badger which Yaqi says has a 24mm knot with a 52mm loft but again mine was different with a 26mm knot and a 53mm loft ( the Obsidian is a very nice brush but just a little too big for me which is why I bought the 'Ever Helpful' ). And I put them against an Omega Boar 10049 for comparison.
Below is a photo of it I took next to its bigger brother the Yaqi Obsidian 2 Band Badger which Yaqi says has a 24mm knot with a 52mm loft but again mine was different with a 26mm knot and a 53mm loft ( the Obsidian is a very nice brush but just a little too big for me which is why I bought the 'Ever Helpful' ). And I put them against an Omega Boar 10049 for comparison.