Starting Dermaneedling, Is 1.5mm Too Short?

[ThickAndTired]

Hi,

I have started experimenting with microneedling for a lack of a better option so far.

I was hoping to hear some advice from experienced users

Using a 1.5mm dermastamp, i find it does not cause any bleeding or even redness, also when pressing firmly.

Should i consider using 2 or 2.5mm to make a more noticeable impact?

Thanks