Sunbird String Sandals Sizing & Fit Guide
By Birdies | Published: 2026-10-25
Category: Product Reviews
Learn how the Sunbird String sandals fit, how to adjust the secret elastic straps, and which size to choose for your foot type.
Quick answer
The Sunbird String sandals fit true to size for most foot shapes, but the secret elastic on the side lets you adjust the instep straps to accommodate narrow to medium-wide feet.
Why the secret elastic matters for fit
The Sunbird String has a barefoot feel with soft tubular straps, but the real fit secret is the hidden elastic on the side. This allows the instep straps to be adjustable, so you can tighten or loosen them depending on your foot volume. If you have a higher instep, you can let the elastic out a bit; if your foot is on the narrower side, you can pull the straps snugger for a secure hold.
Width and arch considerations
These sandals are designed with a flexible front contoured footbed, which offers light arch support. They work best for low to medium arches. If you have very high arches or need substantial arch support, you may find the footbed too flat. The straps are adjustable but the overall width is not; very wide feet may feel constrained even with the elastic loosened.
How to find your perfect Sunbird String fit
- If your foot is narrow to medium width: Order your usual sandal size. The adjustable elastic straps let you cinch the instep for a snug, non-slip feel.
- If your foot is medium-wide or has a high instep: Order your usual size and loosen the elastic straps fully. The sandal will still hold your foot securely without digging in. If you are between sizes, size up for extra width room.
- If you have very wide feet or need strong arch support: The Sunbird String may feel too narrow or flat. Consider a sandal with a wider base or more structured footbed instead.
Product facts at a glance
- The Sunbird String - Gold Jewels: Barefoot, but held in all the right places with the softest tubular straps. Secret elastic on the side makes the instep straps adjustable to fit your foot type. You can customize the strap tension for a secure fit whether your foot is narrow or slightly wider.
The Sunbird String - Gold Jewels - The Sunbird String - Onyx Jewels: Barefoot, but held in all the right places with the softest tubular straps. Secret elastic on the side makes the instep straps adjustable to fit your foot type. The Onyx Jewels version offers the same adjustability, so you can choose the color that matches your wardrobe without compromising fit.
The Sunbird String - Onyx Jewels
Who should wear the Sunbird String?
Best for
- People with narrow to medium-width feet who want a barefoot feel
- Anyone who likes adjustable straps for a custom fit
Not ideal for
- Very wide feet that need extra room in the sole
- Those who require substantial arch support or a rigid footbed
