US Needles: 2 and 3
Pattern: The Grady Sleep Sack from Brownie Knits
(Full pattern name: The Ella and The Grady Sleep Sacks)
If you are a knitter and want the pattern, it is available for purchase on my Etsy site and in Ravelry. Not a knitter and want to order a sack? You can purchase one via my Etsy site for $35. I have some current colors up on the site, but we can customize colors for you, too. Click here for the Etsy store.