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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Yoofoss Baby Sleep Sack 0-6 Month 0.5TOG 100% Organic Cotton 2-Way Zipper

Product ID: 504480770

Details

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

🌿100% Organic Cotton - GOTS Certified

🔄2-Way Zipper for Easy Diaper Changes

🛌Roomy Fit Promotes Healthy Hip Development

¥13929

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Description

🌙 Sleep in Style, Wake Up Smiling!

PURE COMFORT PURE CARE - Crafted from GOTS-certified 100% organic cotton, ensuring breathable softness that’s gentle on your baby’s sensitive skin.
MIDNIGHT MAGIC MADE EASY - Innovative 2-way zipper design lets you change diapers swiftly without waking your little one, complete with protective guards for scratch-free comfort.
SLEEP SMARTER GROW HEALTHIER - Designed to support healthy hip development and longer, sounder sleep—because your baby deserves the best start every night.
FREEDOM TO MOVE WARMTH TO STAY - Thoughtfully roomy arm, neck, and leg openings allow natural movement while preventing the sack from being kicked off, keeping baby cozy all night.
TRIPLE THE STYLE TRIPLE THE CONVENIENCE - Three versatile colors in one pack, perfect for any nursery aesthetic and ideal for busy parents who need quick, reliable sleepwear rotation.

The Yoofoss Baby Sleep Sack for 0-6 months combines 100% GOTS-certified organic cotton softness with a smart 2-way zipper for hassle-free diaper changes. Its roomy yet secure design promotes healthy hip development and keeps babies warm without overheating. Available in a convenient 3-pack with gender-neutral colors, this sleep sack is a must-have for parents seeking comfort, safety, and style in baby sleepwear.

Specifications

ASIN	B0BMLT3M13
Additional Features	Breathable, Machine wash, Skin-friendly, Soft
Age Range Description	Newborn
Best Sellers Rank	#134 in Baby ( See Top 100 in Baby ) #2 in Baby Wearable Blankets
Brand Name	Yoofoss
Closure Type	Zipper
Color	Banana&leaf&green
Customer Reviews	4.8 4.8 out of 5 stars (9,205)
Fabric Type	100% Cotton
Global Trade Identification Number	06974796527857
Item Dimensions L x W	28"L x 18"W
Item Highlight	Wearable Blankets Toddler Sleeping Sack 3 Pack, Comfy Soft Lightweight
Manufacturer	Shenzhenshi Aisifang Clothing Co.,Ltd.
Manufacturer Part Number	SS-F-022
Material	Cotton
Model Number	SS-F-022
Number of Items	3
Number of Packs	3
Seasons	Winter
Size	Small
Unit Count	3 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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¥13929

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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