Size guide
Boys' suits for ages 9–10
Suits whose size range covers 134–146 cm, roughly ages 9 to 10. Height matters more than age: check his measurement against the calculator first.
Find his size| Suit | Fits height | Price | Checked | Where to buy |
|---|---|---|---|---|
| Black Suit Set H&M, jacket + trousers | 134–146 cm | £47 est. | Checked 10 Nov 2026 | Check price at H&M (opens in a new tab) |
| Navy Eid Suit Set SIRRI, jacket + trousers + waistcoat | 116–134 cm | £49 est. | Checked 10 Nov 2026 | Check price at SIRRI (opens in a new tab) |
| Grey Three-Piece Suit Next, jacket + trousers + waistcoat | 122–134 cm | £62 est. | Checked 10 Nov 2026 | Check price at Next (opens in a new tab) |
| Grey Check Three-Piece Suit Marks & Spencer, jacket + trousers + waistcoat | 128–146 cm | £62 est. | Checked 10 Nov 2026 | Check price at Marks & Spencer (opens in a new tab) |
| 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 Next, jacket + trousers + bow-tie , slim fit | 146–170 cm | £75 est. | Checked 10 Nov 2026 | Check price at Next (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) |
| Ivory Communion Suit John Lewis, jacket + trousers + shirt | 122–134 cm | £85 est. | Checked 10 Nov 2026 | Check price at John Lewis (opens in a new tab) |
| Green Three-Piece Monsoon, jacket + trousers + waistcoat | 128–146 cm | £95 est. | Checked 10 Nov 2026 | Check price at Monsoon (opens in a new tab) |
| Grey Wool Three-Piece John Lewis, jacket + trousers + waistcoat | 128–146 cm | £98 est. | Checked 10 Nov 2026 | Check price at John Lewis (opens in a new tab) |
| Grey Tuxedo Set Monsoon, jacket + trousers + bow-tie | 146–164 cm | £99 est. | Checked 10 Nov 2026 | Check price at Monsoon (opens in a new tab) |
| Navy Slim Three-Piece Marc Darcy, jacket + trousers + waistcoat , slim fit | 134–158 cm | £145 est. | Checked 10 Nov 2026 | Check price at Marc Darcy (opens in a new tab) |
| Burgundy Three-Piece Marc Darcy, jacket + trousers + waistcoat | 128–146 cm | £149 est. | Checked 10 Nov 2026 | Check price at Marc Darcy (opens in a new tab) |
| Grey Tweed Three-Piece Marc Darcy, jacket + trousers + waistcoat | 122–146 cm | £155 est. | Checked 10 Nov 2026 | Check price at Marc Darcy (opens in a new tab) |
| Black Tuxedo Marc Darcy, jacket + trousers + bow-tie | 146–170 cm | £165 est. | Checked 10 Nov 2026 | Check price at Marc Darcy (opens in a new tab) |
| Navy Three-Piece (Marketplace) Marc Darcy, jacket + trousers + waistcoat Marketplace listing, confirm the seller at checkout. | 134–158 cm | £139 est. | Checked 10 Nov 2026 | Check price at Amazon UK (opens in a new tab) |
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Black Suit Set
H&M, jacket + trousers
£47 est. 134–146 cm Checked 10 Nov 2026Check price at H&M (opens in a new tab) -
Navy Eid Suit Set
SIRRI, jacket + trousers + waistcoat
£49 est. 116–134 cm Checked 10 Nov 2026Check price at SIRRI (opens in a new tab) -
Grey Three-Piece Suit
Next, jacket + trousers + waistcoat
£62 est. 122–134 cm Checked 10 Nov 2026Check price at Next (opens in a new tab) -
Grey Check Three-Piece Suit
Marks & Spencer, jacket + trousers + waistcoat
£62 est. 128–146 cm Checked 10 Nov 2026Check price at Marks & Spencer (opens in a new tab) -
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
Next, jacket + trousers + bow-tie , slim fit
£75 est. 146–170 cm Checked 10 Nov 2026Check price at Next (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) -
Ivory Communion Suit
John Lewis, jacket + trousers + shirt
£85 est. 122–134 cm Checked 10 Nov 2026Check price at John Lewis (opens in a new tab) -
Green Three-Piece
Monsoon, jacket + trousers + waistcoat
£95 est. 128–146 cm Checked 10 Nov 2026Check price at Monsoon (opens in a new tab) -
Grey Wool Three-Piece
John Lewis, jacket + trousers + waistcoat
£98 est. 128–146 cm Checked 10 Nov 2026Check price at John Lewis (opens in a new tab) -
Grey Tuxedo Set
Monsoon, jacket + trousers + bow-tie
£99 est. 146–164 cm Checked 10 Nov 2026Check price at Monsoon (opens in a new tab) -
Navy Slim Three-Piece
Marc Darcy, jacket + trousers + waistcoat , slim fit
£145 est. 134–158 cm Checked 10 Nov 2026Check price at Marc Darcy (opens in a new tab) -
Burgundy Three-Piece
Marc Darcy, jacket + trousers + waistcoat
£149 est. 128–146 cm Checked 10 Nov 2026Check price at Marc Darcy (opens in a new tab) -
Grey Tweed Three-Piece
Marc Darcy, jacket + trousers + waistcoat
£155 est. 122–146 cm Checked 10 Nov 2026Check price at Marc Darcy (opens in a new tab) -
Black Tuxedo
Marc Darcy, jacket + trousers + bow-tie
£165 est. 146–170 cm Checked 10 Nov 2026Check price at Marc Darcy (opens in a new tab) -
Navy Three-Piece (Marketplace)
Marc Darcy, jacket + trousers + waistcoat
Marketplace listing, confirm the seller at checkout.
£139 est. 134–158 cm Checked 10 Nov 2026Check price at Amazon UK (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.
Sizes are shown as fitted height ranges from each brand's published chart. Between sizes? Take the larger one, he'll grow into it within the season.