To help reduce sizing issues, we recommend selecting based on your baby's HEIGHT as the primary reference. Here's our size guide (cm and inch units included) for easy reference: - **6-9 months**: **73cm size** – fits heights of **66-73cm (26.0-28.7 inches)** - **9-12 months**: **80cm size** – fits heights of **73-80cm (28.7-31.5 inches)** - **12-18 months**: **90cm size** – fits heights of **80-90cm (31.5-35.4 inches)** - **18-24 months**: **100cm size** – fits heights of **90-100cm (35.4-39.4 inches)** - **2-3 years**: **110cm size** – fits heights of **100-110cm (39.4-43.3 inches)** - **3-4 years**: **120cm size** – fits heights of **110-120cm (43.3-47.2 inches)** - **4-5 years**: **130cm size** – fits heights of **120-130cm (47.2-51.2 inches)** *Note: These are general recommendations. Please refer to your child's actual measurements for the best fit.*