les dents d'une fraise = teeth
but "taille" here is not the number of teeth. It's the number of surfaces created by the tool - only one surface, two or three at the same time see p.20 of this pdf
https://www.technios.be/servlet/Repository?ID=34131LES OPÉRATIONS PRINCIPALES DU FRAISAGE
LES FRAISES
Fraise rouleau 1 taille
(pour produire des) Surfaces planes
Fraise cylindrique à 2 tailles
(pour produire des) Surface plane et angles
Fraise 3 tailles - Dentures alternées
(pour produire des) Gorges, rainure
Looong time ago I learned hands-on how to use this type of machinery (fraises, tours, raboteuses, etc ...) so it does make it easier for me to visualise all this, and see what can make sense or not. Still, I'm not sure what would be the right technical term in EN for this meaning of "taille".