Should hold most all soldering irons.
The whole unit is 30mm tall. Both sets of fingers are 21mm wide. The cup is 58mm wide by 26mm deep with a slight brim at the top to help hold in copper/brass wool, or a cellulose sponge to remove excess solder and flux residue from your tip.
I prefer metal over the sponge which is why I made it the size to hold most cheap scouring pads you can get at a dollar store.