Oh wow, just what I've always wanted for HS!
I figure it can make them smaller/shorter too? btw, ny none modifier mod, you mean Alexae's right? Or is it something else?
something else, actually, this one
Honey Select Additional Bone Modifier (v0.5.0 update 09/22)
you'll also need this one because they work together
Honey Select Wide Slider (slider limit change v0.5.1 update 09/22)
after installing those, next time you open a character on create a character or in studio a new file will be created on your userdata/chara/female (or male) folder named CharaF_(some random numbers here).png.bonemod where you can edit the size of the bones freely, smaller or bigger. to edit hairs you need to put those lines separated:
-1,cf_J_hairBC_s,False,1,1,1,1
-1,cf_J_hairBL_s,False,1,1,1,1
-1,cf_J_hairBR_s,False,1,1,1,1
you should edit the value "false" to "true" in order to make the value work, HairBC will be "center" (usually back hair) and BL/BR, left and right sides. the numbers "1" are coordinates x,y,z with the last one being size, change it into small values like 0.9, 0.8 or 1.1, 1.2, it makes a noticeable difference. after seeing what exactly each number does, feel free to input any number there.
as an example, for the ponytail i'm using:
-1,cf_J_hairBC_s,True,1.2,2,1.2,0.9 <- actually only line really making the ponytail longer, the values below affected other hair i was using..
-1,cf_J_hairBL_s,True,1.1,2.7,1,1
-1,cf_J_hairBR_s,True,1.1,2.7,1,1