It depends on the sock style: For crew, quarter, knee-high, and dress socks: Size up. Socks that are slightly too large are more comfortable than socks that are too tight (which can restrict circulation and cause discomfort). The extra fabric will be minimal and won't cause issues inside shoes. For ankle and no-show socks: Size down. These styles need a snug fit to stay in place — if they are too loose, they will slip down into the shoe, which is more annoying than a slightly tight sock. For compression socks: Follow the manufacturer's size chart precisely (based on ankle/calf circumference, not just shoe size). If you are between sizes, consult the manufacturer or a healthcare professional — compression sock sizing is critical for both effectiveness and safety. General rule: When in doubt, size up for most styles. You can always wear slightly larger socks, but too-tight socks are unwearable. Also, remember that all socks shrink 2-5% after the first wash — if you are between sizes, the larger size will shrink to fit more closely after washing.

Our socks run true to size for most customers. We pre-shrink all socks during manufacturing (steam boarding at 120-140°C) and knit them slightly oversized (3-5%) to account for residual post-wash shrinkage. This means after the first wash, your socks will fit true to the size chart. However, there are a few exceptions: If you have wide feet (EE width or wider): Consider sizing up by one size for extra width — our standard socks fit medium-width feet (D width). If you have large calves (> 40cm / 16" circumference): Size up for crew/knee-high styles, or choose our wide-cuff option. If you have narrow feet (B width or narrower): Consider sizing down for ankle/no-show styles to prevent slipping. Best way to confirm: Order a sample pair (we offer free samples on bulk orders of 200+ pairs) and test the fit before placing your full order. This eliminates sizing risk entirely.

Yes, absolutely — you can order any mix of sizes in the same design at no extra cost. For example, you could order 100 pairs of the same design: 20 pairs S, 40 pairs M, 30 pairs L, 10 pairs XL. Each size is knitted with the same design and colors — the only difference is the dimensions. There is no per-size setup fee or minimum per size (the 50-pair MOQ applies to the total order, not per size). Size labels: Each pair is labeled with its size (woven into the sole or printed on the inner cuff), so you can easily sort and distribute them. Packaging: We can pack sizes separately (each size in its own carton or polybag) or mixed (assorted sizes per carton) — just specify your preference when ordering. Recommended size distribution: For adult unisex: S 15%, M 35%, L 35%, XL 15%. For men's: M 20%, L 45%, XL 30%, XXL 5%. For women's: XS 10%, S 30%, M 40%, L 20%. These are general guidelines — adjust based on your specific customer demographic.

Compression sock sizing is different from regular sock sizing — it requires three measurements, not just shoe size: 1. Ankle circumference: Measure around the narrowest part of your ankle, just above the ankle bone. This is the most important measurement for compression socks — the compression level is calibrated based on ankle size. 2. Calf circumference: Measure around the widest part of your calf (usually at mid-calf). This determines whether the sock will fit comfortably and provide even compression up the leg. 3. Shoe size / foot length: Standard foot measurement to determine the foot portion of the sock. When to measure: Measure in the morning, before your legs swell (compression socks should be put on first thing in the morning when legs are least swollen). How to use measurements: Compare all three measurements to the manufacturer's size chart. If your measurements fall into different size categories (e.g., ankle = M, calf = L), choose the size that fits the ankle — the ankle measurement is most critical for proper compression. The calf portion of the sock has some stretch and can accommodate a range of calf sizes. Important: If you have diabetes, peripheral neuropathy, or any circulatory condition, consult your doctor before wearing compression socks. Compression socks are medical devices and should be sized and used under professional guidance for medical conditions.

Sock shrinkage is almost always caused by heat — either hot water washing or high-heat drying. Here's what likely happened and how to fix it: Cause 1: Hot water wash. Washing socks in hot water (40°C / 104°F+) causes cotton and wool fibers to contract and shrink. Fix: Always wash socks in cold water (30°C / 85°F maximum). Cause 2: High-heat drying. This is the #1 cause of sock shrinkage. Tumble drying on medium or high heat causes fibers to contract and elastic to break down. Fix: Hang dry or lay flat to dry. If you must use a dryer, use the lowest heat setting and remove socks while slightly damp. Cause 3: Bleach or harsh detergents. Bleach and strong detergents can damage fibers and cause shrinkage and fading. Fix: Use mild detergent, no bleach, no fabric softener. Can I unshrink socks? For cotton and wool socks, you can sometimes relax the fibers: soak in lukewarm water with hair conditioner (15 minutes), gently stretch to original size, and lay flat to dry. This works best for mild shrinkage (5% or less) — significant shrinkage is usually permanent. Prevention: Always check the care label before washing. Our socks come with clear care instructions (cold wash, hang dry recommended). Following these instructions will keep your socks fitting true to size for 50+ washes.