When it comes to writing out rolls, it all really depends on the composer. Usually in Concert & Symphonic band, You’ll see rolls written with Whole, Half, and Quarter Note Stems. In marching/rudimental drumming music, you can sometimes see Whole, Half, and Quarter Note stems in sheet music, but you’ll quite often see rolls written with 8th and 16th note stems. It’s a bit rare to see 64th note rolls, but it’s in here for reference.