Size Guide Policy

At SEANCLAIRE Athletica, every piece is intentionally designed with its own silhouette, performance function, and fabric blend. Because of this, our products do not follow one universal or standard sizing system. Each style may fit differently to support movement, comfort, and sculpting in a unique way.

Size Guide Policy 

At SEANCLAIRE Athletica, every piece is intentionally designed with its own silhouette, performance function, and fabric blend. Because of this, our products do not follow one universal or standard sizing system. Each style may fit differently to support movement, comfort, and sculpting in a unique way. 

Choosing the Right Size Within a Range 

  • Many of our size charts display body-fit ranges (for example, Underbust: 66–72 cm). For the most comfortable and supportive fit, we recommend selecting a size within the middle or lower end of the range rather than choosing the tightest maximum measurement. 
  • Example: If a body-fit size range is 66–72 cm, customers with body-fit measurements between 66–68 cm will typically experience a more balanced, comfortable fit than sizing at the upper limit of 72 cm, which may feel more compressive. 
Before You Checkout 

To ensure the best possible fit, we kindly ask all customers to: 

  • Review the specific size chart and garment measurements listed on each product page. 
  • Compare the measurements to your own body or a similar piece you already own. 
  • Understand that sizing can vary between collections, fabrics, and design details. 

Completing your order confirms that you have reviewed and understood the sizing details for your selected items. 

How to Measure Yourself 

To help you find the right fit for each SeanClaire piece, use the guide below. For best results, measure over lightweight clothing and keep the measuring tape level and snug but not tight. 

1. Bust / Chest 

Wrap the measuring tape around the fullest part of your chest, keeping it straight across your back. This helps determine your correct bra, top, and jacket size. 

2. Waist 

Measure around the narrowest part of your waist usually just above the belly button. This measurement helps select leggings, shorts, and fitted tops. 

3. Hips 

Stand with your feet together and measure around the fullest part of your hips and glutes. This measurement ensures accurate sizing for leggings, shorts, and fitted bottoms. 

4. Inseam 

Measure from the top of your inner thigh down to your ankle. This determines length fit for leggings, flares, and pants. 

5. Underbust (for sports bras) 

Place the tape directly under your bust and measure around your ribcage. This helps match the correct bra band size. 

Helpful Tips
  • Use a flexible measuring tape. 
  • Measure twice to ensure accuracy. 
  • When between sizes, consider the product’s fabric stretch and fit description (e.g., “compressive,” “relaxed,” “seamless stretch”).