Size guide
Boys' suits for ages 3–4
Suits whose size range covers 98–110 cm, roughly ages 3 to 4. Height matters more than age: check his measurement against the calculator first.
Find his size| Suit | Fits height | Price | Checked | Where to buy |
|---|---|---|---|---|
| Navy Two-Piece Suit H&M, jacket + trousers | 86–104 cm | £44 est. | Checked 10 Nov 2026 | Check price at H&M (opens in a new tab) |
| Blue Suit Set H&M, jacket + trousers | 98–116 cm | £44 est. | Checked 10 Nov 2026 | Check price at H&M (opens in a new tab) |
| Blue Wedding Four-Piece SIRRI, jacket + trousers + waistcoat + tie | 92–110 cm | £45 est. | Checked 10 Nov 2026 | Check price at SIRRI (opens in a new tab) |
| Blue Chino-Style Suit Set Next, jacket + trousers | 86–98 cm | £48 est. | Checked 10 Nov 2026 | Check price at Next (opens in a new tab) |
| Cream Eid Suit Set SIRRI, jacket + trousers + waistcoat | 98–116 cm | £49 est. | Checked 10 Nov 2026 | Check price at SIRRI (opens in a new tab) |
| Grey Suit Set H&M, jacket + trousers + waistcoat | 110–122 cm | £49 est. | Checked 10 Nov 2026 | Check price at H&M (opens in a new tab) |
| Navy Slim-Fit Two-Piece Suit Next, jacket + trousers , slim fit Jacket and trousers only, add a shirt and tie. | 98–110 cm | £52 est. | Checked 10 Nov 2026 | Check price at Next (opens in a new tab) |
| Navy Two-Piece Suit Marks & Spencer, jacket + trousers | 110–122 cm | £55 est. | Checked 10 Nov 2026 | Check price at Marks & Spencer (opens in a new tab) |
| Grey Check Five-Piece SIRRI, jacket + trousers + waistcoat + shirt + tie | 110–122 cm | £55 est. | Checked 10 Nov 2026 | Check price at SIRRI (opens in a new tab) |
| Burgundy Suit Set Marks & Spencer, jacket + trousers Waistcoat sold separately. | 104–122 cm | £58 est. | Checked 10 Nov 2026 | Check price at Marks & Spencer (opens in a new tab) |
| Navy Page Boy Eight-Piece Set SIRRI, jacket + trousers + waistcoat + shirt + tie + bow-tie | 86–104 cm | £59 est. | Checked 10 Nov 2026 | Check price at SIRRI (opens in a new tab) |
| Green Tweed-Style Suit Marks & Spencer, jacket + trousers + waistcoat | 98–116 cm | £65 est. | Checked 10 Nov 2026 | Check price at Marks & Spencer (opens in a new tab) |
| Cream Wedding Four-Piece Set Next, jacket + trousers + waistcoat + tie | 98–116 cm | £68 est. | Checked 10 Nov 2026 | Check price at Next (opens in a new tab) |
| Green Summer Suit John Lewis, jacket + trousers | 110–122 cm | £68 est. | Checked 10 Nov 2026 | Check price at John Lewis (opens in a new tab) |
| Navy Linen-Blend Suit John Lewis, jacket + trousers | 92–110 cm | £75 est. | Checked 10 Nov 2026 | Check price at John Lewis (opens in a new tab) |
| Ivory Ceremony Two-Piece Monsoon, jacket + trousers | 98–122 cm | £79 est. | Checked 10 Nov 2026 | Check price at Monsoon (opens in a new tab) |
| Navy Page Boy Five-Piece Monsoon, jacket + trousers + waistcoat + shirt + tie | 92–116 cm | £89 est. | Checked 10 Nov 2026 | Check price at Monsoon (opens in a new tab) |
| Burgundy Velvet Suit Monsoon, jacket + trousers + waistcoat | 104–122 cm | £119 est. | Checked 10 Nov 2026 | Check price at Monsoon (opens in a new tab) |
| Grey Three-Piece Set SIRRI, jacket + trousers + waistcoat Marketplace listing, confirm the seller at checkout. | 110–128 cm | £38 est. | Checked 10 Nov 2026 | Check price at Amazon UK (opens in a new tab) |
| Navy Five-Piece Page Boy Set SIRRI, jacket + trousers + waistcoat + shirt + tie Marketplace listing, confirm the seller at checkout. | 98–122 cm | £42 est. | Checked 10 Nov 2026 | Check price at Amazon UK (opens in a new tab) |
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Navy Two-Piece Suit
H&M, jacket + trousers
£44 est. 86–104 cm Checked 10 Nov 2026Check price at H&M (opens in a new tab) -
Blue Suit Set
H&M, jacket + trousers
£44 est. 98–116 cm Checked 10 Nov 2026Check price at H&M (opens in a new tab) -
Blue Wedding Four-Piece
SIRRI, jacket + trousers + waistcoat + tie
£45 est. 92–110 cm Checked 10 Nov 2026Check price at SIRRI (opens in a new tab) -
Blue Chino-Style Suit Set
Next, jacket + trousers
£48 est. 86–98 cm Checked 10 Nov 2026Check price at Next (opens in a new tab) -
Cream Eid Suit Set
SIRRI, jacket + trousers + waistcoat
£49 est. 98–116 cm Checked 10 Nov 2026Check price at SIRRI (opens in a new tab) -
Grey Suit Set
H&M, jacket + trousers + waistcoat
£49 est. 110–122 cm Checked 10 Nov 2026Check price at H&M (opens in a new tab) -
Navy Slim-Fit Two-Piece Suit
Next, jacket + trousers , slim fit
Jacket and trousers only, add a shirt and tie.
£52 est. 98–110 cm Checked 10 Nov 2026Check price at Next (opens in a new tab) -
Navy Two-Piece Suit
Marks & Spencer, jacket + trousers
£55 est. 110–122 cm Checked 10 Nov 2026Check price at Marks & Spencer (opens in a new tab) -
Grey Check Five-Piece
SIRRI, jacket + trousers + waistcoat + shirt + tie
£55 est. 110–122 cm Checked 10 Nov 2026Check price at SIRRI (opens in a new tab) -
Burgundy Suit Set
Marks & Spencer, jacket + trousers
Waistcoat sold separately.
£58 est. 104–122 cm Checked 10 Nov 2026Check price at Marks & Spencer (opens in a new tab) -
Navy Page Boy Eight-Piece Set
SIRRI, jacket + trousers + waistcoat + shirt + tie + bow-tie
£59 est. 86–104 cm Checked 10 Nov 2026Check price at SIRRI (opens in a new tab) -
Green Tweed-Style Suit
Marks & Spencer, jacket + trousers + waistcoat
£65 est. 98–116 cm Checked 10 Nov 2026Check price at Marks & Spencer (opens in a new tab) -
Cream Wedding Four-Piece Set
Next, jacket + trousers + waistcoat + tie
£68 est. 98–116 cm Checked 10 Nov 2026Check price at Next (opens in a new tab) -
Green Summer Suit
John Lewis, jacket + trousers
£68 est. 110–122 cm Checked 10 Nov 2026Check price at John Lewis (opens in a new tab) -
Navy Linen-Blend Suit
John Lewis, jacket + trousers
£75 est. 92–110 cm Checked 10 Nov 2026Check price at John Lewis (opens in a new tab) -
Ivory Ceremony Two-Piece
Monsoon, jacket + trousers
£79 est. 98–122 cm Checked 10 Nov 2026Check price at Monsoon (opens in a new tab) -
Navy Page Boy Five-Piece
Monsoon, jacket + trousers + waistcoat + shirt + tie
£89 est. 92–116 cm Checked 10 Nov 2026Check price at Monsoon (opens in a new tab) -
Burgundy Velvet Suit
Monsoon, jacket + trousers + waistcoat
£119 est. 104–122 cm Checked 10 Nov 2026Check price at Monsoon (opens in a new tab) -
Grey Three-Piece Set
SIRRI, jacket + trousers + waistcoat
Marketplace listing, confirm the seller at checkout.
£38 est. 110–128 cm Checked 10 Nov 2026Check price at Amazon UK (opens in a new tab) -
Navy Five-Piece Page Boy Set
SIRRI, jacket + trousers + waistcoat + shirt + tie
Marketplace listing, confirm the seller at checkout.
£42 est. 98–122 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.