Quick answer
For a drawstring bikini bottom, choose your usual underwear size as a starting point, then rely on the adjustable side drawstrings to fine-tune the fit—especially if you are between sizes.
Why drawstrings change the sizing game
Unlike fixed-elastic swimwear, a drawstring bikini bottom gives you extra control over the fit. The side ties let you tighten or loosen the waist and hip coverage without changing the actual garment size. That makes sizing more forgiving, but it also means you should focus on the rise and leg opening rather than just the waist measurement.
A common mistake is sizing up for more coverage. In a drawstring style, sizing up can create gaping at the sides, while sizing down may cause the fabric to dig in even when the strings are fully loosened. The goal is a secure fit that still allows the drawstrings to do their job.
Trade-offs: adjustable fit vs. fixed fit
Adjustable drawstrings are great for fluctuating body changes, like bloat or between-day variations. However, the strings can create visible ties that some people find less sleek under clothing. Also, if you prefer a high-cut leg or cheeky coverage, a drawstring style may not give you the exact silhouette you want—the adjustment is mostly at the waist, not the leg line.
Another trade-off: drawstrings can loosen during swimming or activity. A double knot or a small bow can help, but if you plan to surf or do vigorous water sports, a fixed-elastic bottom might stay more securely in place.
Decision rules for choosing your size
- Start with your usual underwear size: Use your go-to underwear size as the base. Drawstring bikini bottoms are designed to fit similarly to briefs, so this is the most reliable starting point.
- Between sizes? Choose the smaller size: Because the drawstrings allow you to loosen the fit, a smaller size gives you more room to adjust. A larger size may end up too loose even when fully tightened. If the smaller size feels too tight at the leg opening, then size up—that's a sign the cut is wrong for you.
- Check the leg opening, not just the waist: The drawstrings adjust the waist, but they don't change the leg openings. Make sure the leg elastic sits comfortably without pinching or gaping. If the leg opening is too tight or too loose, the size is not right regardless of the drawstrings.
- Consider the rise and coverage: Look at the rise (front to back) to ensure it matches your preference for coverage. Drawstrings don't alter the rise, so choose a style that already provides the coverage you want. If you want more or less coverage, look for a different rise rather than relying on the drawstrings.
Product spotlight
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Drawstring Bikini Bottom Mexico - Multicolor: The Oroblù drawstring bikini bottom is crafted in multicolor printed fabric with a subtle front ruching detail and adjustable side drawstrings. The ruching and adjustable strings let you customize the fit and coverage, making it easier to adapt the bottom to your body shape without needing an exact size match.
Drawstring Bikini Bottom Mexico - Multicolor
Who is this fit best for?
Best for
- People who are between sizes and want flexibility in the waist
- Swimmers who prefer adjustable coverage for changing body comfort
Not for
- Those who want a sleek, tie-free look under clothing
- High-intensity water sports where drawstrings might loosen
