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

Yoofoss Baby Sleep Sack 12 18 Months Baby Wearable Blanket

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Description

🌙 Sleep Smart, Dream Big: The Ultimate Baby Sleep Sack Experience

MIDNIGHT MAGIC ZIPPER - Smooth double zipper with interior guard ensures quick, scratch-free diaper changes.
TRIPLE PACK CONVENIENCE - Three versatile colors in one pack keep baby stylish and ready for every bedtime.
FREEDOM TO MOVE STAY WARM - Perfectly sized arm, neck, and leg openings allow movement but prevent kicking off.
BREATHABLE COMFORT ALL NIGHT - Lightweight, sleeveless design with TOG 0.5 keeps baby cozy without overheating.
TRUSTED BY PARENTS EVERYWHERE - Highly rated with 4.8 stars and loved for quality and comfort across all seasons.

The Yoofoss Baby Sleep Sack is a 3-pack of 100% organic cotton wearable blankets designed for toddlers aged 12-18 months. Featuring a breathable, lightweight sleeveless design with TOG 0.5, it ensures optimal warmth without overheating. The innovative 2-way zipper with protective guards allows hassle-free, safe diaper changes. Its roomy fit supports healthy hip development while preventing the sack from being kicked off, promoting longer, sounder sleep. Machine washable and available in unisex colors, this sleep sack is a must-have for modern parents seeking comfort, safety, and convenience.

Specifications

ASIN	B0BMLVL725
Age Range Description	Toddler
Apparel Fabric Stretch	No Stretch
Apparel Fabric Weight Class	Lightweight
Best Sellers Rank	#12,352 in Baby Products ( See Top 100 in Baby Products ) #59 in Baby Wearable Blankets
Brand Name	Yoofoss
Care instructions	Machine Wash
Closure Type	Zipper
Collection Name	All
Color	Green
Customer Reviews	4.8 out of 5 stars 552 Reviews
Fabric Type	100% Cotton
Fit Type	Loose
Fit to Size Sentiment	Good
Garment Size Country	United States
Global Trade Identification Number	06974796528007
Import Designation	Imported
Item Type Name	Baby Sleep Sack
Manufacturer	Shenzhenshi Aisifang Clothing Co., Ltd.
Material	Cotton
Number of Items	3
Occasion	Sleep
Part Number	SS-F-024
Pattern	Print
Product Care Instructions	Machine Wash
Size	L
Sleeve Length Description	Sleeveless
Style	0.5 Tog
Style Number	SS-F-024
Unit Count	3 Count

Reviews

A**R

Perfect for UAE weather

Very comfy products, fast delivery and this is my second time buying from them

23.04.2025

S**K

Good

We've been using it since the baby was 2 months, now she is 8 month old. We changed the size in the middle. Happy with quality. It is thin enough not to be hot, she sleeps in the room with 24 degree with overall pyjama.

26.08.2024

M**R

Excellent quality

highly recommended

22.06.2024

A**E

Muy bonito

100 % algodón y muy recomendable para el verano.

9.07.2026

L**Y

Great for summer

Great lightweight sleep sack for baby in summer 30 degrees plus

10.10.2025

E**E

Good buy!

Looks as ordered, washes well, not much shrinkage and very soft. Good zippers so far. Very happy with them.

27.02.2025

T**N

Great sleep sacks

Great soft, lightweight sleep sacks. They’re a little long but I don’t mind that. Easy to wash and I like the zipper cover as well.

25.05.2026

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