What needle size is required to reduce a size
I have a Thomas the Tank Engine pattern that comes in size 22, 24 & 26 inches. It is knitted in 8 ply on 3.25mm (10) & 4mm (8 ) needles. I would like to knit a 20 inch size but because of the picture I can't just reduce the number of stitches without losing some of the picture. What I want to know is, in order to go down a size should I use 2.75mm (12) & 3.25mm (10) needles or 3.0mm(11) & 3.75mm(11) needles.