9-12 Month Baby Girl Onesies

14 products

Long Sleeve Polo Onesie

4 colors available

Long Sleeve Polo Onesie

4 colors available

Long Sleeve Polo Onesie

4 colors available

Long Sleeve Polo Onesie

4 colors available

Short Sleeve Onesie
Sale price$30.00

4 colors available

Short Sleeve Onesie
Sale price$30.00

4 colors available

Short Sleeve Onesie

4 colors available

Short Sleeve Onesie
Sale price$30.00

4 colors available

Essentials Cami Onesie 3-Pack
Long Sleeve Polo Onesie & Joggers in Meadow
Sale price$58.00 Regular price$66.00
Long Sleeve Polo Onesie & Joggers in Ivory
Sale price$58.00 Regular price$66.00
Short Sleeve Onesie 3-Pack in Cocoa, Meadow, & Ivory
Sale price$79.00 Regular price$90.00
Long Sleeve Polo Onesie & Joggers in Cocoa
Sale price$58.00 Regular price$66.00
Long Sleeve Polo Onesie & Joggers in Bloom
Sale price$58.00 Regular price$66.00
Short Sleeve Onesie & Shorts in Meadow
Sale price$46.00 Regular price$52.00
Short Sleeve Onesie & Shorts in Ivory
Sale price$46.00 Regular price$52.00
Essentials Sleeveless Onesie 3-Pack
Short Sleeve Onesie & Shorts in Bloom
Sale price$46.00 Regular price$52.00
Short Sleeve Onesie 3-Pack in Cocoa, Bloom, & Ivory
Sale price$79.00 Regular price$90.00
Short Sleeve Onesie & Shorts in Cocoa
Sale price$46.00 Regular price$52.00

Our baby girl onesies for 9-12 month olds combines comfort with sustainable luxury, ensuring your little one stays cozy throughout their daily adventures.

From our signature baby girl basics to our specially curated 0-3 months range, each piece reflects our commitment to quality. The ultra-soft fabric delivers exceptional durability while maintaining its premium feel wash after wash. Our 12-18 collection grows with your child, offering the same superior comfort in larger sizes.

Each garment undergoes rigorous quality control to ensure safety and comfort, making our organic Pima cotton onesies the perfect choice for your baby's sensitive skin. Experience the difference of premium materials combined with thoughtful design, exclusively at Monchou.