I couldn't agree more Jim. I am firmly in the 24/48 camp. Anything larger than 26 and I don't enjoy at all, but I could live with a 26/52. This Jade Tulip knot is possibly 22.5/45, which is on the very edge of being too small. If it was a 22/44, too small, at least in my mind. Amazing what a mm means to the size of a knot. I know watch aficionados also debate about the difference of a mm on a watch case, so it's not exclusive to shaving brushes.Very different sides. Both good. Way too small of course.
It's very interesting to me how the size of the knot matters to all of us but there's no general agreement about what size is best.
Some guys, like Cal @Cal think of 23 mm as being the very upper limit of the size range (I hope I'm not wrong about what Cal thinks and apologize if I am). They prefer 18 mm or thereabouts.
Others, like you, might see 23 mm as the bee's knees.
I like 26 mm and up, and think of 24 mm as medium sized and borderline too small, but will admit to occasionally liking to use my Omega Mighty Midget. I'll also admit I don't like all large brushes so some of it depends on the aspects of the brush other than knot size.
A few gentlemen have mentioned their affinity for very large brushes. To them, 28 mm might be the beginning of medium size and 26 mm might fall into the too small range.
I have no idea what any of that means other than to say use what you like, and sell what you don't.
I've just discovered one of my best friends, a local gentleman, has gotten into wet shaving giving me the perfect PIF opportunity. He's my second local PIF opportunity, but the first into the hobby (and into the DE razor).
I like the green (with brown highlights) side better, but both are great. Thanks for showing it off.