Phia Contrast Backless Tank

Name: Phia Contrast Backless Tank
Brand: GymBum UK
SKU: 14:771#Black;5:100014064
Price: 28.99 GBP
Availability: InStock

Engineered with purpose. Worn with confidence

£28.99 GBP

~~£34.99 GBP~~ £28.99 GBP

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Shipped by GymBum UK

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GymBum UK Size Guide

🧡 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

🧍♀️ Women’s Activewear

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

🧍♂️ Men’s Activewear

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 Notes

Asian sizes typically run 1–2 sizes smaller than UK sizing.
For a performance fit, choose your regular UK size.
For a relaxed fit, size up.
Measurements are approximate and may vary slightly by fabric and style.

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.

The Phia Contrast Backless Tank exemplifies contemporary activewear design for those with refined taste and confidence. Featuring a striking backless silhouette, this knitted tank showcases an open back that makes a bold statement while maintaining structural integrity through quality construction. The cropped length and minimalist aesthetic create a modern profile that complements both athletic and casual ensembles with equal ease. Crafted for durability and comfort, the tank's versatile design transitions seamlessly from intense training sessions to post-workout occasions. An ideal choice for individuals who appreciate understated elegance and aren't afraid to embrace fashion-forward activewear.

All Phia leggings are finished with subtle branded detailing on the garment.

New Fit & Size Guide

Fit Update: We’ve updated our sizing to match standard UK fits. Please select your usual UK size.

Tag Information: The size printed on the garment label will show our international manufacturer size.
For example, if you order a UK Large, the label will read XL — this is normal and correct.

Fit Style: This item is designed for a sleek, athletic fit.
If you prefer a more relaxed, everyday feel, we recommend sizing up.

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Phia Contrast Backless Tank