| Age | Shirt Length | Chest Width | Sleeve Length | Shoulder Width | Waist Width |
|---|---|---|---|---|---|
| 2/3 | 44.4 | 31.1 | 36.2 | 29.2 | 30.5 |
| 4 | 47.3 | 34.0 | 37.5 | 31.1 | 33.3 |
| 5 | 48.6 | 35.2 | 39.4 | 31.8 | 34.0 |
| 6 | 53.7 | 36.5 | 41.3 | 33.0 | 35.6 |
| 7 | 56.2 | 37.8 | 43.8 | 34.3 | 37.1 |
| 8 | 59.7 | 39.7 | 48.3 | 36.8 | 39.1 |
| 10 | 61.0 | 41.6 | 51.1 | 39.4 | 40.9 |
| 12 | 62.2 | 43.5 | 52.6 | 40.6 | 42.9 |
| 14 | 64.8 | 45.4 | 53.7 | 41.9 | 44.8 |
| 16 | 67.3 | 47.3 | 55.6 | 43.2 | 46.7 |
Size Chart
Boys Slim Fit Shirt Size Guide – By Age, Height & Weight (Australia)
| Recommended Size | Age Range | Height (cm) | Weight (kg) |
|---|---|---|---|
| 2/3 | 2–3 yrs | 90–98 | 12–14 |
| 4 | 3.5–4.5 yrs | 98–105 | 14–17 |
| 5 | 4.5–5.5 yrs | 105–112 | 17–19 |
| 6 | 5.5–6.5 yrs | 112–118 | 19–21.5 |
| 7 | 6.5–7.5 yrs | 118–124 | 21.5–24 |
| 8 | 7.5–8.5 yrs | 124–130 | 24–26.5 |
| 10 | 9–10 yrs | 130–138 | 27–32 |
| 12 | 11–12 yrs | Recommendation Coming Soon | Recommendation Coming Soon |
| 14 | 13–14 yrs | Recommendation Coming Soon | Recommendation Coming Soon |
| 16 | 15–16 yrs | Recommendation Coming Soon | Recommendation Coming Soon |
Our shirts are slim fit with a tailored look. If your child is on the upper end of height or weight, size up for comfort.
For a slightly looser or longer fit, consider going one size up — especially for events later in the season.
Find Your Child’s Size
Disclaimer: This sizing tool is a guide based on Australian slim-fit shirt standards. Some children may fall outside typical proportions. Please refer to the full measurement chart above for the most accurate sizing. Just Suits is not liable for size selections made using this tool alone.
FAQ's
What if my child is between two sizes?
If your child’s height or weight is at the upper end of a size range, we recommend going one size up for comfort — especially if the event is a few weeks away or your child is still growing.
My child is slim but tall (or short but broad). Will these still fit properly?
Our shirts are designed with a slim fit, but they include enough flexibility to suit a range of proportions. If your child is very tall and slim, go by height first. If they’re broader, consider sizing up. You can also check the detailed measurements above to confirm.
Are the size numbers the same as standard Australian kidswear brands?
Yes — our sizing aligns with typical Australian age-based sizing (e.g. size 6 suits most 5.5–6.5-year-olds). We just offer more detail to help you get a better fit the first time.
Can I trust the height and weight recommendations if I don’t have exact measurements?
Absolutely. If you’re unsure of their exact height/weight, use the age guide as a starting point — it works well for most kids. And if you're ever unsure, just message us — we're happy to help you choose the right size.
Why is there no height/weight range for sizes 12, 14, and 16 yet?
We’re still collecting more data on those sizes to give you the most accurate recommendations. In the meantime, they follow standard age-based sizing and fit most kids in the corresponding age group.
Do the shirts shrink or change shape after washing?
No — all our shirts are pre-shrunk, machine washable, and made to hold their structure and shape, even after regular wear.
