Best size screen for dry sift?

Hi im not sure what size screen i should get.
I can get 43T or 110 US easily not sure about other sizes. what size should i go for?

i like 110 us, any lower number and you start to get a lot of plant material, go much higher and it starts to cut into yield.
i get a little plant material at 110, not a lot, which means to me that i'm getting all the trichs.

Picking average mesh sizes, here are the thoughts of Robert Clarke, in his book, HASHISH. Using a precision sieve stack:

150 microns - large plant debris

130 microns - very large resin glands

110 microns - large resin glands

90 microns - medium resin glands

70 microns - small resin glands and debris

50 microns - very small debris and little resin

below that - very small dust and debris

Taken from: https://skunkpharmresearch.com/diy-sieving-frames/

Personally, I strip with a 150 micron stainless screen and refine at 110 and 70 micron with silkscreen.

Depends on what you want it for. For edibles I use 150-180 micron, better yields and small plant material if it gets through is no big deal for this purpose. For smoking I'd suggest 90-100 micron or smaller.