Hannah, I’m 5’5″ and ride a small yeti asr5 alloy, now I wished i’d gone all out, and bought a carbon with all the trimmings.
Its an awesome bike, found the medium way too big.
They do an extra small in the carbon, but that just felt weird. and too small for my frame, might be ok if you have a small torso.
But the bike is alive, energetic, and just balls out fun and grin inducing to ride. not slating the blur and the 5 I test rode on the day, but this was in a different league.