OPI Size Guide
OPI is renowned for its premium nail lacquers, nail care products, and professional beauty treatments. While OPI primarily focuses on nail and beauty products rather than apparel or footwear, this guide provides essential sizing information for any OPI-branded merchandise, accessories, or companion products you may purchase. OPI's commitment to quality extends across all product categories, ensuring consistent sizing standards and a comfortable fit for all customers.
How to Measure
For OPI apparel and accessories, accurate measurement ensures the best fit and comfort:
- Measure in the evening. Feet and body measurements can swell during the day, so taking measurements later in the day provides a more accurate baseline for sizing.
- Use a soft measuring tape. Wrap the tape gently around the relevant area (chest, waist, or hips for clothing; foot length for shoes) without pulling too tightly.
- Measure both sides. For shoes, measure both feet as one foot is often slightly larger. Always size to fit your larger foot.
- Record measurements in centimetres and inches. Refer to the conversion charts below to match your measurements to the correct size label.
- Consider the fit style. OPI products tend to run true to size, but if you prefer a looser fit, sizing up by one size is recommended, particularly for branded merchandise and accessories.
- Check brand-specific guidance. Different product lines may have slight variations in fit. Always review product descriptions and customer feedback before purchasing.
Women's Clothing & Merchandise Sizes
| Size Label | UK | US | EU | Chest (inches) | Waist (inches) | Hips (inches) |
|---|---|---|---|---|---|---|
| XS | 6 | 2 | 34 | 32–34 | 24–26 | 34–36 |
| S | 8 | 4 | 36 | 34–36 | 26–28 | 36–38 |
| M | 10–12 | 6–8 | 38–40 | 36–38 | 28–30 | 38–40 |
| L | 14 | 10 | 42 | 38–40 | 30–32 | 40–42 |
| XL | 16 | 12 | 44 | 40–42 | 32–34 | 42–44 |
| XXL | 18–20 | 14–16 | 46–48 | 42–44 | 34–36 | 44–46 |
Men's Clothing & Merchandise Sizes
| Size Label | UK | US | EU | Chest (inches) | Waist (inches) | Length (inches) |
|---|---|---|---|---|---|---|
| XS | 34 | XS | 44 | 34–36 | 28–30 | 27–28 |
| S | 36 | S | 46 | 36–38 | 30–32 | 28–29 |
| M | 38–40 | M | 48–50 | 38–40 | 32–34 | 29–30 |
| L | 42 | L | 52 | 40–42 | 34–36 | 30–31 |
| XL | 44 | XL | 54 | 42–44 | 36–38 | 31–32 |
| XXL | 46–48 | XXL | 56–58 | 44–46 | 38–40 | 32–33 |
Unisex Footwear Sizes
OPI branded footwear and shoes typically use unisex sizing based on standard UK, US, and EU conversions. Women's sizes generally run approximately 1.5 sizes smaller than men's sizes within the same EU measurement.
| UK Size | US Men's | US Women's | EU Size | Foot Length (cm) | Foot Length (inches) |
|---|---|---|---|---|---|
| 3 | 4 | 5 | 36 | 22.5 | 8.9 |
| 4 | 5 | 6 | 37 | 23.5 | 9.25 |
| 5 | 6 | 7 | 38 | 24.0 | 9.5 |
| 6 | 7 | 8 | 39 | 24.5 | 9.65 |
| 7 | 8 | 9 | 41 | 25.5 | 10.04 |
| 8 | 9 | 10 | 42 | 26.5 | 10.43 |
| 9 | 10 | 11 | 43 | 27.0 | 10.63 |
| 10 | 11 | 12 | 44 | 28.0 | 11.02 |
| 11 | 12 | 13 | 45 | 28.5 | 11.22 |
| 12 | 13 | 14 | 46 | 29.5 | 11.61 |
| 13 | 14 | 15 | 47 | 30.5 | 12.01 |
Product-Specific Guidance
OPI Nail Care & Beauty Products
OPI's core offerings – nail lacquers, strengtheners, cuticle oils, and professional nail treatments – are available in universal bottle sizes. No sizing is required for these products; they are designed to fit all nail types and hand sizes. When ordering complementary branded merchandise (such as t-shirts, hoodies, or branded salon apparel), refer to the women's or men's size charts above.
OPI Branded Apparel & Merchandise
OPI-branded clothing, such as promotional t-shirts, salon uniforms, or branded fashion pieces, follows standard international sizing conventions. The size charts above reflect typical OPI merchandise fit. If purchasing professionally for a salon, consider that staff may require a range of sizes; XS through L covers most requirements. Always check product images and customer reviews for fit feedback, as some branded merchandise may run slightly loose or fitted depending on fabric and cut.
Accessories (Bags, Hats, Accessories)
OPI-branded bags, caps, and accessories typically come in one-size-fits-most or adjustable sizes. Where sizing is offered (e.g., branded baseball caps with adjustable straps), no conversion is needed. For fitted accessories, refer to the unisex sizing guidance or contact customer service to confirm fit before purchase.
Professional Salon Merchandise
If you are outfitting a salon or professional team with OPI-branded uniforms or apparel, order a mix of sizes centred on your team's average fit (typically S through L). Consider allowing staff to choose their preferred fit from a size range; comfort and confidence boost professional presentation. OPI professional-grade merchandise is designed to withstand frequent washing and wear.
Promotional & Limited-Edition Items
Seasonal or limited-edition OPI merchandise may have unique fits or cuts. Always verify sizing before checkout, as some promotional items run small or large. Check the product description and any available size reviews or fit notes.
Sizing Tips
- OPI clothing typically runs true to size. If you are between sizes, choose the larger size for comfort, especially for branded t-shirts and merchandise.
- Measure your foot in the evening. Feet swell throughout the day, so measuring after a full day of activity ensures your shoe size is accurate and comfortable for all-day wear.
- Women's shoe sizes are typically 1.5 sizes smaller than men's in the same EU number. Always check which sizing system a particular shoe uses (unisex, men's, or women's) before converting.
- Consider band width and fabric type for apparel. Thicker fabrics (e.g., hoodies, sweatshirts) may feel slightly snug compared to lightweight t-shirts in the same size. If in doubt, size up.
- Salon staff uniforms should prioritise comfort. Professional apparel is worn for extended hours; sizing should allow for movement and layering. Test fit before ordering in bulk.
- Check return and exchange policies before purchasing. International or online orders may have restocking fees or time limits. Verify measurements using the charts and guidance above to minimise returns.
- Brand-specific sizing can vary by product line and manufacturing date. If you have purchased OPI merchandise previously, note your chosen size for that item and compare fit feedback in current product listings.
- EU and UK shoe sizes are not identical. Whilst conversions are close, small differences exist due to different measurement systems (barleycorn vs. Paris points). Always measure and verify before ordering internationally.