Do horses' mouths get wider?

[LouisCat]

Stupid question alert!

Regarding bit size, do horses mouths get much wider from 3 years old onwards? I'm not really sure where their heads stop growing!

 

[ycbm]

Oh yes! Just had to move my not quite five year old to a bigger bit.

.

 

[DD]

yes they do as the horse grows have got through 3 different sizes when mine were growing

 

[Bernster]

Yes in my case - a bit that fitted mine aged 5/6 was a little too small at age 9.

 

[scruffyponies]

Yes, but speaking for ponies, it doesn't seem consistent. Some widen significantly, others only a little.

 

[Gloi]

I think they do a little bit when they change their teeth.

 

[LouisCat]

I've been bitting my youngster with a 5.5 but feel it's a bit big but if his mouth is likely to widen a bit then I'll stick with it I think rather than going back down to 5.25