You can request that a dummy be a half size 2 1/2" up to 5 1/2".  

Order one of these items for each dummy you which to be cut down in this way.

Your order needs to include the dummy the next whole inch size bigger than your finished size.  (3 1/2" order 4", 4 1/2" order 5" etc.)

In the Comment section during checkout please note which dummies are to be cut and to what size.