
I bought the 6 to 12 month size for my 4 month old. It is big but works just fine. He will be able to use it for a long time. We bought this as a transition from a swaddle blanket but now that his arms aren't swaddled, he wakes up more in the night. :( Our house is cold in the winter and when I feed him at night, his hands are still cold but overall I think he is warmer with the sleep sack.

Soft Fleece Swaddle Blanket For Newborn Baby Boys And Girls - XMWEALTHY Stroller Wrap In Dark Blue
30 Review

UOMNY Soft 100% Cotton Fitted Crib Sheet For Standard Crib And Toddler Mattresses - Safari Animal Jungle Theme Nursery Bedding For Boys And Girls - 1 Pack Toddler Sheet
28 Review

Baby Floral Fitted Crib Sheet For Boy And Girl Toddler Bed Mattresses Fits Standard Crib Mattress 28X52 (Pink Mint Floral)
29 Review

Experience Comfort And Playtime With Ingenuity Cozy Spot Reversible Duvet Activity Gym And Play Mat - Calla, 33X33X19 Inch
48 Review

Organize In Style With COSYLAND'S Extra Large Woven Cotton Laundry Basket
41 Review

Large Toy Box Chest For Boys & Girls - 24.5"X13" X16", Flip-Top Lid, Divider, Collapsible Storage Bins For Nursery, Playroom, Closet & Living Room | Homyfort (Black)
39 Review

Pampers diapers New Baby Dry 2, 4-8 kg, 94 pcs., white
87 Review

Kids Kitchen Step Stool with Safety Rail - Toddler Learning Tower for Kitchen Counter, Kitchen Helper Stool for Toddlers 18+ Months - Solid Wood
40 Review