Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
Free UK Shipping Over £49 — Fast Dispatch
Official GymBum UK Store — Premium Gymwear & Equipment
Trusted UK Fitness Brand — Shop TikTok, Amazon & GymBumUK.com
🧡 GymBum UK Sports Bra Size Guide
| Size | Chest (inches) | Underbust (inches) |
|---|---|---|
| XS | 33 ⅛ | 27 ½ |
| S | 34 ⅝ | 29 ⅛ |
| M | 36 ¼ | 30 ¾ |
| L | 39 ⅜ | 33 ½ |
| XL | 42 ½ | 36 ¼ |
| 2XL | 45 ⅝ | 39 |
| 3XL | 48 ⅞ | 41 ¾ |
| UK | US | EU | Asian | Tops / Bras | Leggings / Shorts | Trainers (UK/EU/US) |
|---|---|---|---|---|---|---|
| 4–6 | 0–2 | 32–34 | S | XS | XS | 3.5 / 36 / 5 |
| 8–10 | 4–6 | 36–38 | M | S | S | 4–5.5 / 37–38 / 6–7.5 |
| 12–14 | 8–10 | 40–42 | L | M | M | 6–7.5 / 39–40 / 8–9.5 |
| 16 | 12 | 44 | XL | L | L | 8–8.5 / 41–42 / 10–11 |
| 18 | 14 | 46 | XXL | XL | XL | 9–9.5 / 43–44 / 11.5–12 |
| UK | US | EU | Asian | Tops / Hoodies | Shorts / Joggers | Trainers (UK/EU/US) |
|---|---|---|---|---|---|---|
| S | S | 46 | M | 36–38" Chest | 30" Waist | 6–7 / 39–40 / 7–8 |
| M | M | 48–50 | L | 38–40" Chest | 32–34" Waist | 8–9 / 41–42 / 9–10 |
| L | L | 52 | XL | 42–44" Chest | 36" Waist | 10 / 43–44 / 11 |
| XL | XL | 54 | XXL | 46–48" Chest | 38" Waist | 11 / 45–46 / 12 |
| XXL | XXL | 56 | 3XL | 50–52" Chest | 40–42" Waist | 12–13 / 47–48 / 13–14 |
Fit Tip: Some of our activewear follows Asian sizing (approx. 1–2 sizes smaller than UK). Refer to the GymBum Size Guide for accurate conversions.
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand
FREE UK Shipping on Orders £50+
Order Before 3PM — Same-Day Dispatch
Official GymBum UK® — Registered Brand