Brand size guide
River Island boys' suit sizes
River Island's published boys' size chart in cm, dated and sourced, plus every River Island suit we compare, with dated prices.
Find his size 6 sizes in the chart 3 suits compared £65–£81 checked 10 Nov 2026
River Island size chart
| Size | Fits height up to | Chest | Waist |
|---|---|---|---|
| 3–4 yrs | 104 cm | 55 cm | 54 cm |
| 5–6 yrs | 116 cm | 60 cm | 56 cm |
| 7–8 yrs | 128 cm | 65 cm | 58 cm |
| 9–10 yrs | 140 cm | 70 cm | 62 cm |
| 11–12 yrs | 152 cm | 76 cm | 67 cm |
| 13–14 yrs | 164 cm | 82 cm | 72 cm |
Checked 10 Nov 2026 Transcribed from River Island's online boys' size guide. Sizes rounded to whole cm.
Slim fits throughout. Size up for a regular jacket cut.
River Island suits compared
| Suit | Fits height | Price | Checked | Where to buy |
|---|---|---|---|---|
| Navy Slim Two-Piece River Island, jacket + trousers , slim fit | 146–164 cm | £65 est. | Checked 10 Nov 2026 | Check price at River Island (opens in a new tab) |
| Black Tuxedo Set River Island, jacket + trousers + bow-tie | 152–170 cm | £75 est. | Checked 10 Nov 2026 | Check price at River Island (opens in a new tab) |
| Grey Three-Piece Suit River Island, jacket + trousers + waistcoat | 122–134 cm | £81 est. | Checked 10 Nov 2026 | Check price at River Island (opens in a new tab) |
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Navy Slim Two-Piece
River Island, jacket + trousers , slim fit
£65 est. 146–164 cm Checked 10 Nov 2026Check price at River Island (opens in a new tab) -
Black Tuxedo Set
River Island, jacket + trousers + bow-tie
£75 est. 152–170 cm Checked 10 Nov 2026Check price at River Island (opens in a new tab) -
Grey Three-Piece Suit
River Island, jacket + trousers + waistcoat
£81 est. 122–134 cm Checked 10 Nov 2026Check price at River Island (opens in a new tab)
est. = guide price from the retailer's listing, not a live price. "Checked" shows when we last saw the price at the retailer.