Size Guide

At Śiirap, every piece is designed specifically with fuller bust support in mind, without compromising on style.

Our bikini tops use a unique sister sizing system to create a more flexible fit across multiple cup and band sizes, while our bottoms and one pieces follow standard Australian sizing.

If you are between sizes or unsure which size will suit you best, our adjustable designs allow flexibility depending on your preferred level of support and coverage.

Bikini Tops Size Guide

Śiirap bikini tops use a 1–6 sizing system designed specifically for D+ busts.

Our sizing works using sister sizing, meaning multiple traditional bra sizes can fit within the same Śiirap size.

All Śiirap bikini tops feature:

6-loop adjustable back closures
Fully adjustable straps or halter neck ties
Supportive D+ focused construction
Flexible fit across sister sizes

This allows you to customise your fit for the perfect balance of support, lift, and comfort.

Bikini Tops Size Chart

Śiirap Size	Fits
1	8E, 10DD, 12D, 14C, 16B
2	8F, 10E, 12DD, 14D, 16C
3	8G, 10F, 12E, 14DD, 16D
4	10G, 12F, 14E, 16DD
5	12G, 14F, 16E
6	14G, 16F

General Fit Guide

Our bikini tops are designed to fit flexibly across sister sizes, however fit may vary slightly between styles depending on:

Underwire structure
Coverage level
Fabric tension
Strap placement
Level of adjustability

Some styles may feel firmer for maximum support, while others may offer a softer or more relaxed fit.

Because all Śiirap bikini tops feature a 6-loop adjustable back closure and fully adjustable straps or halter neck ties, many customers may comfortably wear more than one size depending on their preferred fit.

If you are between sizes:

Size down for a firmer, more sculpted fit
Size up for additional comfort or coverage

We also recommend checking individual product fit notes for style-specific sizing guidance.

Bikini Bottoms Size Guide

Śiirap bikini bottoms follow standard Australian sizing.

Our swim fabric is designed to sculpt comfortably while still allowing stretch and movement.

If you are between sizes, we recommend:

Sizing down for a more sculpted fit
Sizing up for additional coverage

Bikini Bottoms Size Chart

Size	Waist	Hips
6	60–64 cm	84–88 cm
8	65–69 cm	89–93 cm
10	70–74 cm	94–98 cm
12	75–79 cm	99–103 cm
14	80–84 cm	104–108 cm
16	85–89 cm	109–113 cm

One Piece Size Guide

Śiirap one pieces follow standard Australian sizing while incorporating supportive D+ focused bust construction.

Because our one pieces are designed for fuller bust support, some customers may prefer sizing based on their bust first, depending on the level of support and coverage they prefer.

One Piece Size Chart

Australian Size	Bust	Waist	Hips
6	80–84 cm	60–64 cm	84–88 cm
8	85–89 cm	65–69 cm	89–93 cm
10	90–94 cm	70–74 cm	94–98 cm
12	95–99 cm	75–79 cm	99–103 cm
14	100–104 cm	80–84 cm	104–108 cm
16	105–109 cm	85–89 cm	109–113 cm

Between Sizes?

Because all Śiirap swimwear is designed with adjustable and supportive construction, some customers may comfortably wear more than one size depending on their preferred fit.

If you prefer: