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Description
xThe Endurance+ fabric is Speedo’s go-to choice for regular pool training. It combines 53% polyester and 47% PBT to deliver a suit that holds its shape session after session. Chlorine resistance is built into the fabric itself, not applied as a finish, so performance does not fade over time.
Repeated contact with pool walls, lane ropes and kickboards can cause ordinary swimsuit fabric to pill and roughen quickly. This suit is engineered to resist that surface wear, keeping it looking and feeling smooth throughout a full training season. It is a practical choice for juniors who train frequently.
Thin straps reduce restriction across the shoulders, allowing a full range of motion during drills and stroke work. The classic coverage cut sits securely in place without riding up, so young swimmers can focus on technique rather than adjusting their suit. A front lining adds a layer of comfort and confidence.
Not sure on sizing? See our Speedo Global Fit Junior Girls 4yrs-16yrs Size Guide or ask our swimwear experts for advice.
← Scroll to see all sizes →
| Size | 4yrs / 22 | 6yrs / 24 | 8yrs / 26 | 10yrs / 28 | 12yrs / 30 | 14yrs / 32 | 16yrs / 34 |
|---|---|---|---|---|---|---|---|
| International Size Equivalents | |||||||
| GB Age / Size | 4yrs / 22 | 6yrs / 24 | 8yrs / 26 | 10yrs / 28 | 12yrs / 30 | 14yrs / 32 | 16yrs / 34 |
| D (Germany): Height | 104cm | 116cm | 128cm | 140cm | 152cm | 164cm | 176cm |
| F (France) | 4 ans | 5–6 ans | 7–8 ans | 9–10 ans | 11–12 ans | 13–14 ans | 15–16 ans |
| I (Italy) | 4 anni | 5–6 anni | 7–8 anni | 9–10 anni | 11–12 anni | 13–14 anni | 15–16 anni |
| Lat Am | Talla 22 | Talla 24 | Talla 26 | Talla 28 | Talla 30 | Talla 32 | Talla 34 |
| Aus | Girl 2 | Girl 4 | Girl 6 | Girl 8 | Girl 10 | Girl 12 | Girl 14 |
| USA | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
| CAN | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
| MEX | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
| Body Measurements (cm) | |||||||
| Chest / Bust | 52–56 | 57–61 | 62–66 | 67–73 | 74–79 | 80–85 | 86–91 |
| Waist* | 52–53 | 54–56 | 57–60 | 61–64 | 65–68 | 69–71 | 72–75 |
| Hip** | 55–59 | 60–64 | 65–70 | 71–76 | 77–84 | 85–90 | 91–97 |
| Body Measurements (inches) | |||||||
| Chest / Bust | 20½–22 | 22½–24 | 24½–26 | 26½–28½ | 29–31 | 31½–33½ | 34–36 |
| Waist* | 20½–21 | 21½–22 | 22½–23½ | 24–25 | 25½–26½ | 27–28 | 28½–29½ |
| Hip** | 21½–23 | 23½–25 | 25½–27½ | 28–30 | 30½–33 | 33½–35½ | 36–38 |
All measurements are body measurements, not garment measurements. For further guidance view our full size guide or ask our swimwear experts.
Endurance+ uses a PBT polyester blend that resists chlorine degradation from within the fibre rather than relying on a surface treatment. This means the fabric retains its shape, colour and elasticity far longer than a standard suit used in regular pool sessions.
Speedo junior suits are sized by height and chest measurement rather than clothing age. We recommend checking our Speedo Global Fit Junior Girls 4yrs-16yrs Size Guide before ordering to ensure the best fit, as sizing can vary between ranges.
This suit is designed for training and lessons rather than competition. The thin-strap, classic-coverage design prioritises comfort and durability over the compression fit used in race suits, making it ideal for frequent pool sessions.
Although Endurance+ fabric is highly chlorine resistant, rinsing the suit in clean, cool water straight after each session will help extend its life. For full guidance on keeping your swimsuit in the best condition, see our full product aftercare guide.
View our full swimwear product aftercare guide to ensure you look after your kit properly.
Allens Swimwear is a family-run business founded in 1976 by Dennis Allen and his daughter Linda Beal. It started from a genuine need. “With 2 swimmers in the family it was often difficult to find the right kit, so dad and I took the plunge and started selling to local swimmers at our local pool in Kingsbury out of a suitcase and we’ve never looked back.” Today, Linda, her husband Richard, and three of their children Danny, Will and Jenna still run the business together. The suitcase may be long gone, but the founding principle of helping swimmers get the right kit remains exactly the same.
Shipping & Returns
xUK Delivery Options
🚚 Free UK Delivery
Free delivery on all orders over £40
For orders below £40, delivery charges will be displayed at checkout.
The total order value, including any deals or discounts (such as a discount code), must be over £40.
📮 Royal Mail
📦 UPS
🚀 DHL Courier
🏪 In Store Collection
Free in store collection is available. Simply choose this option at checkout and pick up your order at our store.
🕐 Delivery Times
EU Delivery Options
✈️ FedEx
International Delivery Options
🌍 International Shipping
📮 Royal Mail
🚀 DHL Courier
Important Information
FAQs
We offer several delivery options, including Standard Delivery, Express Delivery, and International Shipping.
Delivery times depend on the option you choose at checkout. Standard Delivery typically takes 2–3 days, while Express Delivery is usually delivered within 1–2 days. International delivery times may vary by location.
Delivery costs vary based on the shipping method and destination. Standard delivery starts at £4.99, and express delivery starts at £14.99. International shipping rates are calculated at checkout.
Yes, we offer free delivery on orders over £40. Terms and conditions apply.
Yes, once your order is dispatched, you'll receive a tracking number via email to monitor its progress.
Yes, we deliver to many countries worldwide. Delivery times and costs for international orders are shown at checkout.
If your order hasn't arrived within the estimated timeframe, please contact us with your order number, and we'll assist you.
If you're not available, the courier will typically leave a card with instructions on how to rearrange delivery or collect your parcel.
We can make changes to your delivery address if your order hasn't been dispatched. Please contact us as soon as possible.
If your order arrives damaged or is incomplete, please contact our customer service team as soon as possible with photos and your order number, and we'll resolve the issue promptly.
Currently, we don't deliver to PO Boxes and BFPO addresses. Please check specific delivery options at checkout.
For express or special deliveries, you may be able to select a preferred delivery date at checkout.
Returns Policy
We offer a free returns service. We advise that customers keep either proof of posting or a receipt as we cannot be held accountable for items lost being returned to us.
Please note that this returns policy does not cover items such as special order swimwear, customised products and products ordered specifically at the request of a customer. Products such as these cannot be returned (unless faulty).
Free UK Returns
If you are unhappy with your purchase for any reason, then we will gladly refund you within 28 days of purchase. Simply click on the link below to begin the returns policy:
ALLENS OF KINGSBURY RETURNS
Returns outside of the UK are at the buyer's cost. Please return to us at the address below.
Please ensure that you have completed a CN22 Customs declarations form and that this has been clearly marked as being Returned Goods. Please mark the return parcel on the outside clearly as returned goods. Failure to do this could result in Customs charges being applied to the parcel on its return. I regret we cannot accept parcels with customs duties and charges payable — these will be returned to sender.
Non-Faulty Goods
Please return items with the original packaging if possible and to keep hygiene seals on suits, please also include a copy of the invoice received clearly stating on this that you would like a refund for the return.
Please note that we will not accept non-faulty items back that have been worn or without their relevant packaging, labels or stickers.
If you would like to exchange an item for an alternative size, style or item please follow the link to us along with a copy of your invoice, please note on the invoice what item is required as an alternative.
Faulty Goods
In the case of faulty goods, please contact us and provide details of the nature of complaint along with photos and the date of purchase and the care given to product.
In all cases of complaint we will endeavour to substitute faulty goods with an identical replacement, or substitute the goods with ones of similar value. This does not affect your statutory rights, and you may of course choose to have a complete refund if you are not 100% happy.
How to Return an Item
If you have any questions about delivery, please contact us.
Size chart
This size guide covers Speedo Global Fit junior girls' swimwear in numeric sizes 22–34 (equivalent to ages 4–16 years). All measurements are body measurements taken from your child's body, not garment measurements. Always use the chest/bust measurement as the primary guide. International size equivalents (D, F, I, Lat Am, Aus, USA, CAN, MEX) are included in the sizing table below.
Shop Speedo Girls' Swimsuits →
Take all measurements directly against your child's skin using a soft tape measure. All measurements are body measurements, not garment measurements.
*Waist is measured 5cm below the natural waist. **Hips are measured 10cm below the natural waist around the widest point.
| Sizing | 4yrs / 22 | 6yrs / 24 | 8yrs / 26 | 10yrs / 28 | 12yrs / 30 | 14yrs / 32 | 16yrs / 34 |
|---|---|---|---|---|---|---|---|
| International Size Equivalents | |||||||
| GB Age / Size | 4yrs / 22 | 6yrs / 24 | 8yrs / 26 | 10yrs / 28 | 12yrs / 30 | 14yrs / 32 | 16yrs / 34 |
| D (Germany) — Height | 104cm | 116cm | 128cm | 140cm | 152cm | 164cm | 176cm |
| F (France) | 4 ans | 5–6 ans | 7–8 ans | 9–10 ans | 11–12 ans | 13–14 ans | 15–16 ans |
| I (Italy) | 4 anni | 5–6 anni | 7–8 anni | 9–10 anni | 11–12 anni | 13–14 anni | 15–16 anni |
| Lat Am | Talla 22 | Talla 24 | Talla 26 | Talla 28 | Talla 30 | Talla 32 | Talla 34 |
| Aus | Girl 2 | Girl 4 | Girl 6 | Girl 8 | Girl 10 | Girl 12 | Girl 14 |
| USA | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
| CAN | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
| MEX | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
| Body Measurements (cm) | |||||||
| Chest / Bust | 52–56 | 57–61 | 62–66 | 67–73 | 74–79 | 80–85 | 86–91 |
| Waist* | 52–53 | 54–56 | 57–60 | 61–64 | 65–68 | 69–71 | 72–75 |
| Hip** | 55–59 | 60–64 | 65–70 | 71–76 | 77–84 | 85–90 | 91–97 |
| Body Measurements (inches) | |||||||
| Chest / Bust | 20½–22 | 22½–24 | 24½–26 | 26½–28½ | 29–31 | 31½–33½ | 34–36 |
| Waist* | 20½–21 | 21½–22 | 22½–23½ | 24–25 | 25½–26½ | 27–28 | 28½–29½ |
| Hip** | 21½–23 | 23½–25 | 25½–27½ | 28–30 | 30½–33 | 33½–35½ | 36–38 |
*Waist is measured 5cm below the natural waist at the narrowest point. **Hips are measured 10cm below the natural waist around the widest point. All measurements are body measurements, not garment measurements.
Measure your child's chest, waist, and hips against their skin with a soft tape measure. Use the chest as the primary guide and compare to the sizing table above. Age is shown as a guide only — always use body measurements to confirm the right size, as children grow at different rates.
We recommend sizing to your child's current measurements rather than sizing up for growth. A swimsuit that is too large will not stay in place during swimming and may cause discomfort. Speedo's chlorine-resistant fabrics feel firm when new and ease slightly with regular use — a well-fitted suit will still feel comfortable after a few sessions.
Use the chest measurement to decide. If the chest falls between two sizes, choose the larger size. If the chest and hip measurements suggest different sizes, prioritise the chest — it is the hardest area to adjust in a one-piece swimsuit. Speak to a member of staff at Allens if you are unsure.
Yes. Speedo junior swimsuits are designed for regular pool use and are made from chlorine-resistant fabric suited to frequent swimming lessons and training sessions. For competitive swimming, Speedo also offer junior racing suits — speak to a member of staff at Allens for guidance on the right product for your child's level.
Speedo junior swimsuit sizes do not directly correspond to standard clothing or school uniform sizes. Always use body measurements to select the correct size. The age equivalents shown in the table are a secondary guide only — a child who wears age 10 in school clothing may need a different size in Speedo swimwear depending on their measurements.
Speedo junior swimsuits are designed primarily for pool use. While the chlorine-resistant fabrics will withstand occasional use in open water or the sea, prolonged exposure to salt water can accelerate fabric wear. Always rinse the suit thoroughly in fresh water after every use, whether in a pool, the sea, or open water.
Rinse in cold fresh water immediately after every use to remove chlorine, salt, and sunscreen. Hand wash gently with a mild detergent if needed. Do not machine wash, tumble dry, iron, or dry-clean. Store flat and dry, away from direct sunlight. Avoid sitting on rough pool surrounds in the swimsuit as this can cause premature fabric wear.
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