How to shape neck

#1

I’m working on a Debbie Bliss jacket with seed stitch bands and the instructions are a little vague. Here’s what it says:

Shape Neck
Next row K to last 11 sts, leave these sts on a stitch holder
Dec 1 st at neck edge on every row until 20 sts remain
Cont straight until front measures same as back to shoulder, ending at armhole edge

I am at the point where I have the 20 stitches remaining. I don’t understand what she means by saying front measures same as back to shoulder. Any insight?

#2

Keep knitting on the front until it’s the same length as the back piece to where the shoulder is.