I was very worried about the sizing. After lots of consideration, I first cast-on the "2 years" size. A few inches in, I showed it to Mark's mom said she thought it looked too big. So I frogged it and cast-on the "12-18 months size" (I mean, he *is* 12 months old, after all). I had the whole back panel done and I was really happy with the size, but then showed it to Nan Penney, who thought it looked too small.
I had a mini panic attack, but I was not frogging it again.
Luckily, it fits him with room to spare. He should get a lot of wear out of it. And he looks pretty darn adorable in it, if I do say so myself:

Project Details
Pattern: Keene Toddler Vest
Yarn: Patons Decor in Rich Grey Heather 87673 (MC) and Rich Country Blue 87622 (CC). I chose this yarn so the vest would be machine washable.
Needles: Addi 40" circulars, sizes US 6 (4.0 mm) and US 9 (5.5 mm)
Notes:
- I made the body of the vest a little longer than instructed in the pattern because others on Ravelry had commented that it knit up a little short.
- I knit fewer rows of ribbing for the arm and neck bands because the ribbing looked too "long" to me in the pattern photo.
- I seamed the shoulders using the 3 needle bind-off as suggested in the pattern, and mattress-stitched the sides.





