Slightly shorter than our so-called 'small brush', this is actually sturdier and the natural bristles measure 15mm across the ferrule as opposed to the small brush's 8mm.

A handy medium glue brush for the application of PVA.  You can use with other glues, but clean before the glue dries using warm water, or whatever solvent the glue manufacturer recommends. Overall length 155mm - brush width 15mm approx.