80% OFF 🔊 Use code THANKYOU80 for min £100 spend. Everything must go, no restocks !!!

Collection: Products

Plush matching set

Plush matching set

Regular price ¥18,048 JPY

Regular price Sale price ¥18,048 JPY
Unit price per
Ribbed collection

Ribbed collection

Regular price From ¥8,480 JPY

Regular price Sale price From ¥8,480 JPY
Unit price per
Royal blue tennis dress

Royal blue tennis dress

Regular price ¥13,482 JPY

Regular price Sale price ¥13,482 JPY
Unit price per
Running sports bra

Running sports bra

Regular price ¥8,698 JPY

Regular price Sale price ¥8,698 JPY
Unit price per
Scallop cross back matching set

Scallop cross back matching set

5 total reviews

Regular price ¥18,918 JPY

Regular price Sale price ¥18,918 JPY
Unit price per
Scallop pilates set

Scallop pilates set

6 total reviews

Regular price ¥18,918 JPY

Regular price Sale price ¥18,918 JPY
Unit price per
Scallop pilates set summer edition

Scallop pilates set summer edition

Regular price ¥18,700 JPY

Regular price ~~¥0 JPY~~ Sale price ¥18,700 JPY
Unit price per
Scallop sports bra

Scallop sports bra

Regular price ¥8,480 JPY

Regular price Sale price ¥8,480 JPY
Unit price per
Scalloped jumpsuit

Sold out

Scalloped jumpsuit

1 total reviews

Regular price ¥13,917 JPY

Regular price ~~¥19,353 JPY~~ Sale price ¥13,917 JPY
Unit price per

Sold out
Scalloped pilates set

Scalloped pilates set

1 total reviews

Regular price ¥18,918 JPY

Regular price ~~¥0 JPY~~ Sale price ¥18,918 JPY
Unit price per
Sports bra black- pink- pilates- running

Sports bra black- pink- pilates- running

Regular price ¥8,480 JPY

Regular price Sale price ¥8,480 JPY
Unit price per
Sports bra yoga - pilates

Sports bra yoga - pilates

Regular price ¥8,480 JPY

Regular price Sale price ¥8,480 JPY
Unit price per
Summer shorts running

Summer shorts running

Regular price ¥6,958 JPY

Regular price Sale price ¥6,958 JPY
Unit price per
Tennis dress 🎾

Sale

Tennis dress 🎾

Regular price ¥9,133 JPY

Regular price ~~¥13,699 JPY~~ Sale price ¥9,133 JPY
Unit price per

Sale
The Muse jumpsuit

Sale

The Muse jumpsuit

11 total reviews

Regular price ¥13,699 JPY

Regular price ~~¥19,788 JPY~~ Sale price ¥13,699 JPY
Unit price per

Sale
Two pieces summer essential

Two pieces summer essential

Regular price ¥13,699 JPY

Regular price ~~¥9,133 JPY~~ Sale price ¥13,699 JPY
Unit price per

Zero feel set

Elevate Your Style with Fresh Arrivals from Our Just Landed Collection!

Example product title

¥20 JPY

¥20 JPY

Clearance Sale

End of season clearance SALE Please note products are not refundable but...

Clearance Sale

Let customers speak for us

from 286 reviews

The perfect Pilates socks

A great fit and so comfortable.
Stay in place during a class.
Highly recommend.

Tricia Myatt

12/09/2025

Pilates and yoga grip socks shorter

Pilates and yoga grip socks shorter

Gorgeous soft pink

Obsessed with this sports bra love all colours but soft pink is like eating marshmallows.

Angela B

11/21/2025

Flowline sports bra

Flowline sports bra

Burgundy set

So pleased with this set. The perfect colour for autumn/winter. Beautiful burgundy colour. Can't wait to wear it.

Channelle Myers

11/10/2025

Pilates leggings set super soft

Pilates leggings set super soft

Leggings

First purchase from Belsize of leggings for Pilates. Great fit and so pleased with quality. Will definitely purchase again and recommend.

Lynne Smith

10/27/2025

Scalloped leggings

Scalloped leggings

So beautiful to move in

I love this jumpsuit so much. It feels like a second skin when on. The colour is beautiful, too. I especially loved the scallop-crossed back. It's a definite must-buy in any colour.

Channelle Myers

10/17/2025

Scalloped jumpsuit

Scalloped jumpsuit

Beautiful unique set

Don’t hesitate to buy. Beautiful sets. Sculpt the body nicely. Love them.

Channelle Myers

09/19/2025

Scallop cross back matching set

Scallop cross back matching set

As a yoga teacher, I wash my activewear every single day. This is the only bra that hasn’t lost its color or shape absolutely amazing

Courtney

09/17/2025

White sports bra

White sports bra

Great support

Top of excellent quality leggings are like second skin

A****ra

09/17/2025

Pilates leggings set super soft

Pilates leggings set super soft

Second skin

Like a second skin probably the most comfortable leggings

Ana

09/17/2025

Pilates leggings set super soft

Pilates leggings set super soft

Stunning

Beautiful colour perfect fit. I wish I knew earlier for Belsize. Best price

Jordan

09/17/2025

Flared leggings and sports bra set

Flared leggings and sports bra set

My second colour

Bought fist set in brown colour it hold my tummy extremely well, absolutely love coral 🪸 colour. Temptation for the black set 👀

Jady

09/17/2025

Pilates set high support sports bra

Pilates set high support sports bra

The best gym set

I first bought only pocket leggings after wearing them daily they are still the same. I have treated my self with full set. Very good quality

Tamara

09/17/2025

Pocket leggings & sports bra

Pocket leggings & sports bra

Absolutely amazing

Love the fabric but finally pockets that hold my phone. Very comfortable. I wish they have in more colours.

Tamara

09/17/2025

Pocket leggings

Pocket leggings

Unbelievable love it

After giving birth, I honestly thought I’d never feel confident in leggings again but this Scallop Set holds my mummy tummy in beautifully! 💖 The quality is amazing, and the sports bra gives strong support even though it’s a one shoulder design. I’ve already ordered another colour before it sells out again!

Stacey

09/09/2025

Scallop pilates set

Scallop pilates set

Wearing it every day, everywhere! Obsessed

I paired it with the pink padded top and honestly felt like a total tennis babe! The fit is super flattering, not too short, and moves perfectly on the court. The fabric is soft but supportive, I’ve worn it for both tennis and running it’s that cute. Definitely a must-have set! 🎾💗 We’ll done Belsize

Harper.S

06/08/2025

Padel and Tennis Skirts – Stylish Skorts for Tennis & Picklebal

Padel and Tennis Skirts – Stylish Skorts for Tennis & Picklebal