How to choose a boys suit
Quick answers
- Most versatile choice: a navy or grey 3-piece suit (jacket, waistcoat and trousers). It suits weddings, christenings, First Communion and school formals, and the jacket can come off when it gets warm.
- Suit or tuxedo? A suit for almost every occasion; a tuxedo only for black-tie evening events or when the groomsmen wear tuxedos.
- Size: measure height, chest and waist, then check the size chart on the product page. Between sizes? Choose the larger one.
- When to order: 4–8 weeks before the event. Tracked delivery to Australia, the US, Canada and the UK takes 7–9 business days.
- Toddlers and babies: choose a soft 4–5 piece set with an elastic waist – see our baby and toddler suit guide.
Which type of boys suit should you choose?
| Type | What's included | Best for |
|---|---|---|
| 3-piece suit | Jacket, waistcoat (vest), trousers | Weddings, First Communion, christenings, formal photos |
| 2-piece suit | Jacket and trousers | Summer weddings, school formals, graduations |
| 4–5 piece set | Suit plus shirt, tie or bow tie, sometimes braces | Toddlers and young boys – the whole outfit in one order |
| Waistcoat and trousers | No jacket; add a shirt and bow tie | Hot-weather weddings, page boys, relaxed formal events |
| Tuxedo | Jacket with satin lapels, trousers, usually a bow tie | Black-tie weddings and evening events |
| Blazer and dress pants | Odd jacket with contrasting trousers | Smart-casual events, school occasions, church |
Browse our boys suits and tuxedos, waistcoats, blazers and dress pants.
What is the difference between a suit and a tuxedo for boys?
A tuxedo has satin or grosgrain lapels (and often a satin stripe down the trousers) and is worn with a bow tie. A suit has lapels in the same fabric as the jacket and can be worn with a tie or a bow tie. Tuxedos are for black-tie evening events; a suit works for nearly everything else, including church weddings and daytime ceremonies.
Which colour suit is best for a boy?
- Navy: the most versatile colour – any season, any occasion, and it hides small marks.
- Grey and charcoal: light grey for spring and summer weddings, charcoal for autumn, winter and evening events.
- Beige, sand and light blue: cool and relaxed for garden and beach weddings.
- Black: best for evening events, tuxedo looks or when it matches the groomsmen.
- White and ivory: traditional for First Communion and christenings; less practical for other events.
For a page boy or ring bearer, matching the groomsmen's suit colour is the simplest way to tie him into the photos.
How do you choose the right size?
Each product page has its own size chart in centimetres (1 inch = 2.54 cm). Size labels vary by maker – months (12M, 18M, 24M), years (Size 2, 3, 4), age ranges (Size 4~5) or US-style sizes (2T, 3T, 4T) – so compare your son's measurements with the chart rather than going by age alone.
How to measure
- Height: barefoot, from the top of the head to the floor – the most useful single measurement.
- Chest: around the fullest part, under the arms.
- Waist: around the natural waist, where the trousers will sit.
- Inside leg: from the crotch to the ankle, for trouser length.
Between two sizes, choose the larger one – boys often grow in height before they fill out. Many of our suits have adjustable or elastic waists.
Mix & Match suits
Some of our suits are Mix & Match sets: you choose the size of each piece (jacket, waistcoat, trousers and shirt) separately. This helps when a boy is tall and slim, or broad in the chest but short in the leg – you get a better fit without alterations. Not sure? Send us his measurements through our free size consultation and we will recommend the sizes.
Size conversion: Australia, the US, the UK and Canada
| Height | Approx. age | Australia / NZ | US & Canada | UK |
|---|---|---|---|---|
| 86–92 cm | 18–24 months | 2 / 24M | 24M / 2T | 18–24 months |
| 92–104 cm | 2–4 years | 2–4 | 2T–4T | 2–4 years |
| 104–116 cm | 4–6 years | 4–6 | 4–6 | 4–6 years |
| 116–128 cm | 6–8 years | 6–8 | 6–8 | 6–8 years |
| 128–140 cm | 8–10 years | 8–10 | 8–10 | 8–10 years |
| 140–152 cm | 10–12 years | 10–12 | 10–12 | 10–12 years |
| 152–164 cm | 12–14 years | 12–14 | 12–14 | 12–14 years |
A general guide only – always check the chart on the suit you choose.
How should a boys suit fit?
- Shoulders: the jacket's shoulder seams sit at his natural shoulders, not drooping down the arm.
- Sleeves: end around the wrist bone, with a little shirt cuff showing.
- Jacket: buttons without pulling, and covers the seat of the trousers.
- Waistcoat: meets the trousers with no shirt showing in between.
- Trousers: sit at the waist and rest on the top of the shoe. A little extra length is fine – it can be turned up and let down as he grows.
- Movement test: he can sit, crouch, raise his arms and run without the seams straining.
Shirts, ties and shoes
- Shirts: white goes with every suit; light blue, pink and lilac are popular for spring and summer weddings. See our boys dress shirts.
- Ties and bow ties: pre-tied and clip-on styles are easiest for young boys, and bow ties stay out of food. See our kids ties and bow ties.
- Shoes: black shoes for navy, charcoal and black suits; brown or tan for navy, grey and beige. Let him wear new shoes at home first. See our boys dress shoes and accessories.
What should a boy wear to…
A wedding (page boy, ring bearer or guest)
A 3-piece suit or a waistcoat with a bow tie, in the groomsmen's colour or a coordinating one. For toddlers in the bridal party, a 4–5 piece set with an elastic waist is easiest. Our page boy and ring bearer guide has more outfit ideas.
First Communion
Traditionally a white or ivory suit, although many families now choose navy or grey with a white shirt so the suit can be worn again. Check whether your parish has a dress code. In the US, Canada, the UK and Ireland, most First Communions take place in spring (around April to June); in Australia the timing varies by parish.
A christening or baptism
Babies usually wear white or ivory – see our baby boy baptism outfits. Older brothers look smart in a navy, grey or beige suit.
A graduation or school formal
A navy or charcoal 2-piece suit, or a blazer with dress pants. In Australia, see our Year 6 graduation outfit guide.
When should you buy a boys suit?
Order 4–8 weeks before the event: tracked delivery to Australia, the US, Canada and the UK takes 7–9 business days, and the extra weeks leave time for a size exchange. Busy times to plan for: October–November and March–April weddings in Australia and New Zealand; May–October weddings in the US, Canada and the UK; spring First Communions; and end-of-year school events in Australia and New Zealand (November–December).
Caring for a boys suit
- Hang the jacket on a shaped hanger as soon as it arrives; steam out creases on a low setting.
- After the event, empty the pockets, air the suit and spot-clean marks with a damp cloth.
- Follow the care label – many suits are dry clean only, while some sets can be gently hand washed.
- Store in a breathable garment bag, not plastic, so it is ready for a younger brother.
Delivery and exchanges
- Delivery: tracked delivery to Australia, the US, the UK and Canada takes 7–9 business days. Prices are shown in AUD, USD, GBP or CAD.
- Wrong size? Exchange it once within 28 days, unworn with the tags attached. Suits with the purple “Free Size Exchange · Free Return” badge include a free return label for a new size. See Return & Exchange.
- Your country: Australia, USA, UK, Canada.
Frequently asked questions
What age can a boy wear a suit?
From about 6 months. Baby and toddler suits come as soft 3–5 piece sets with elastic waists; from about age 3 most boys can wear a regular jacket, waistcoat and trousers.
Should a page boy wear a 2-piece or 3-piece suit?
A 3-piece suit looks the most formal and still works if the jacket comes off. For a hot day or a very young page boy, a waistcoat, trousers and bow tie without the jacket is comfortable and still smart.
Is a tuxedo or a suit better for a ring bearer?
Match the groomsmen: a tuxedo if they wear tuxedos, otherwise a suit in their colour. For a toddler, a tuxedo-style 4–5 piece set with an elastic waist is easier to wear.
What colour suit should a boy wear to a summer wedding?
Light grey, beige, sand or light blue are cool and photograph well, and navy works in any season. Choose a lightweight suit and let him take the jacket off after the ceremony.
How far in advance should I buy a boys suit?
4–8 weeks before the event. That covers 7–9 business days of delivery and leaves time for an exchange, without him outgrowing the suit.
Written by the Lucy's team in Auckland, New Zealand – children's formal wear specialists since 1996. Updated November 2026. Browse our boys suits and tuxedos and toddler suits.
