I can make shades to sit on a glass diffuser.
I attach 3 little stops to the spider so they are just inside the rim.


1) Choose the Top Ring :

                                  Clip-on : 3", 4", or 5"

                         Washer Top : 3", 4", 5" or 6" with Flush Spider, or  4" - 18" with 1/2" drop

                                     UNO : 4" & 5" with 1" Drop, 6", 7", 8" with 1 1/2" Drop

2) Choose the Bottom Ring : 3" - 20"

3) Tell me what Straight Vertical Height you would like (from shade rest at top)

4) And tell me which Mica you would like: see below

1) Choose : Washer Top or UNO

2) Tell me what dimensions you need :

(?) Top X (?) Bottom X (?) Straight Vertical Height (from shade rest at top)

3) And tell me which mica you would like