SIZE CHARTS
Every Happyology piece is checked on 3D fitting mannequins through design, pattern-cutting and production, so it sits comfortably and moves with your child. Use the charts below to find the right size.
Each size fits up to the age and height shown. A size 18M fits a child up to 18 months old or 86 cm tall.
Choose the larger size, so your little one can wear it for longer.
Every chart shows your child’s measurements, not the garment’s.
Clothing
Our clothing runs from 6 months to 14 years. Height is the most reliable guide, especially as children get older.
Baby
6 months – 2 years · maximum height and weight
| Size | Height | Weight |
|---|---|---|
| 6M | 68 cm | 7.5 kg |
| 9M | 76 cm | — |
| 12M | 80 cm | 9.5 kg |
| 18M | 86 cm | 11 kg |
| 2Y | 92 cm | 12.5 kg |
Children
2 – 14 years · maximum height
| Size | Height |
|---|---|
| 2Y | 92 cm |
| 3Y | 100 cm |
| 4Y | 106 cm |
| 5Y | 112 cm |
| 7Y | 124 cm |
| 8Y / 9Y | 130 cm |
| 10Y / 11Y | 140 cm |
| 12Y / 13Y | 150 cm |
| 14Y | 160 cm |
Some styles are labelled 8Y, 10Y and 12Y, and others 9Y, 11Y and 13Y. Each pair is cut for the same height, so choose by your child’s height rather than their age.
Hats
Hat sizes vary by style. Measure around your child’s head, then find the size shown on the product page in the card for that style.
Baby hats & bonnets
0 – 18 months
| Size | Head |
|---|---|
| 0-6M | 40–43 cm |
| 6-12M | 43–46 cm |
| 12-18M | 46–49 cm |
Children’s bonnets
Cotton and knitted · 0 – 4 years
| Size | Head |
|---|---|
| 0-1Y | 45–48 cm |
| 1-4Y | 48–51 cm |
Aviator hats, berets, swim caps & knitted beanies
1 – 14 years
| Size | Head |
|---|---|
| 1-4Y | 48–51 cm |
| 5-9Y | 51–54 cm |
| 10-14Y | 54–57 cm |
Knitted aviator hats
0 – 14 years
| Size | Head |
|---|---|
| 0-1Y | 45–48 cm |
| 1-4Y | 48–51 cm |
| 5-9Y | 51–54 cm |
| 10-14Y | 54–57 cm |
Sun hats, bucket hats & caps
0 – 14 years
| Size | Head |
|---|---|
| 0-1Y | 45–48 cm |
| 1-3Y | 48–50 cm |
| 3-6Y | 50–52 cm |
| 6-9Y | 52–54 cm |
| 10-14Y | 54–56 cm |
Socks, tights & accessories
Socks & tights
Maximum height
| Size | Height |
|---|---|
| 0-1Y | 80 cm |
| 2-3Y | 98 cm |
| 4-5Y | 112 cm |
| 6-7Y | 124 cm |
Hair accessories
One size
Fits ages 1 – 14 years
How to measure
Height
Stand your child barefoot against a wall, heels together and looking straight ahead. Lay a book flat on top of their head, mark where it meets the wall, then measure from the floor to the mark. For babies, measure lying down, from the top of the head to the heels.
Head
Wrap a soft tape measure around the widest part of the head: across the forehead just above the eyebrows, over the tops of the ears and round the back. Keep it snug but not tight.
All measurements are body measurements, not garment measurements. Still not sure? Get in touch and we’ll help you choose.
