My baby is 3 months, but is already fitting in 6 month clothes. Should I size up to the medium or stick with the small?

I would if your baby is taller than average. We use the M size and have since my little one was 4 months. They work great! She’s almost 7 months now and they still fit her well. She’s in the 97 percentile for height.

For a baby that’s 28.5 inches long which size is better?

I bought M. My baby is 10 month and 28”, we are currently using them and she still has room

My baby only gains a little over a pound a month and is currently 11.7 and 23.5 in long at 4 months. Should I get small or medium?

When I got mine my baby was 4-5 months old & weighed 13 lbs and was around 24 inches long. I got her medium. She is 6 months old now weighs 17lbs 27.5 inches long & she still has room. I liked hers being a little better because she still has room to move around & likes to have the “freedom” but if your kiddo likes to be a little bit more “snuggled” I would get small.

Does it zip from feet to head for night diaper change?

It zippers up to the head and down to the feet and zip is covered with fabric

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Baby Sleep Sack Baby Wearable Blanket 100% Cotton 2-Way Zipper Toddler Sleeping Sack

Product ID: 513429179

Details

Age Range (Description)
Newborn
Brand
Yoofoss
Closure Type
Zipper
Color
Fabric Type
100% Cotton
Material
Cotton

🌿100% organic cotton - breathable & soft

🔄2-way zipper - easy midnight diaper changes

🛌TOG 0.5 - lightweight warmth, no overheating

$93.90

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Description

🌙 Sleep smart, parent smarter — the ultimate cozy cocoon for your little dreamer!

MIDNIGHT MAGIC ZIPPER - Innovative 2-way zipper design lets you change diapers effortlessly without waking your little one.
TRIPLE THE CONVENIENCE - Three versatile colors in one pack ensure your baby always has a fresh, stylish sleep sack ready for dreamland.
TAILORED FOR EVERY STAGE - Available in four sizes from newborn to 24 months, perfectly fitting your growing baby’s sleep needs.
PURE COMFORT PURE COTTON - Crafted from 100% organic cotton for breathable, gentle softness that keeps your baby cozy without overheating.
FREEDOM TO MOVE SAFETY TO STAY - Roomy arm and neck openings with snug leg fit promote healthy hip development while preventing the sack from being kicked off.

The Yoofoss Baby Sleep Sack is a 3-pack of lightweight, breathable, and machine-washable wearable blankets made from 100% organic cotton. Designed with a TOG rating of 0.5, it ensures warmth without overheating. Featuring a smooth 2-way zipper for easy diaper changes and safety zipper guards, it offers a perfect fit that supports healthy hip development. Available in multiple sizes and neutral colors, it’s an essential sleep solution for babies aged 0-6 months and beyond.

Specifications

ASIN	B0BMLT3M13
ASIN	B0CM41RHDV
Additional Features	Breathable, Machine wash, Skin-friendly, Soft
Age Range Description	Newborn
Best Sellers Rank	#3,221 in Baby Products ( See Top 100 in Baby Products ) #16 in Baby Wearable Blankets
Brand Name	Yoofoss
Closure Type	Zipper
Color	Banana&leaf&green
Customer Reviews	4.8 4.8 out of 5 stars (4,433)
Customer reviews	4.8 4.8 out of 5 stars (4,433)
Date First Available	21 August 2026
Department	Unisex Baby
Fabric Type	100% Cotton
Global Trade Identification Number	06974796527857
Item Dimensions L x W	67L x 45W centimeters
Item Type Name	Baby Sleep Sack
Manufacturer	Yoofoss
Manufacturer	Yoofoss
Manufacturer Part Number	SS-F-022
Material	Cotton
Model Number	SS-F-022
Number of Items	3
Number of Packs	3
Seasons	Summer
ShellMaterial	Cotton
Size	S
Unit Count	3 Count

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$93.90

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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