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The Speedo Jammers - Boom/Bolt is a sporty jammer with iconic Speedo branding. This streamlined boys Jammer features a cool spray-paint effect Speedo Boom graphic in bright blue. Lined at the front for comfort and modesty, it includes an internal drawstring to allow young swimmers to adjust the fit. Providing higher chlorine resistance than standard swimwear fabrics, the jammer offers excellent shape retention and fits like new for longer with CREORA HighClo. If you're looking for great eco-credentials, it's got those, too: our exclusive Eco EnduraFlex fabric is made from 100% recycled pre-consumer waste, such as fabric waste from factories.
Speedo Swimwear the worlds leading swimwear brand. Speedo is passionate about life in and around the water, creating revolutionary new technologies, designs and innovations.
| SPEEDO TRAINING SWIMWEAR BOYS SIZE CHART | |||||
|---|---|---|---|---|---|
| AUS Size | Waist | Chest | Height | GB Size | Alpha |
| 6 | 58cm | 60-65cm | 115-120cm | 5-6yrs / 24 | XS |
| 8 | 60cm | 65-70cm | 125-130cm | 7-8yrs / 26 | S |
| 10 | 65cm | 70-75cm | 140-145cm | 9-10yrs / 28 | M |
| 12 | 65-70cm | 75-80cm | 150-155cm | 11-12yrs / 30 | L |
| 14 | 70-75cm | 80-85cm | 160-165cm | 13-14yrs / 32 | XL |
| 16 | 75-80cm | 85-90cm | 170-175cm | 15-16yrs / 34 | XXL |
| Updated July 2025 | |||||
