Our Shrunken Calf is a chrome-tanned leather from Remy Carriat in France.Tannery: Remy Carriat, FranceTemper: SoftSurface: Natural shrunken grain, non-uniformPatina: NoneWater Resistance: High. To ensure longevity, avoid moisture or soaking our straps in water.As our straps are handcrafted with natural leather, each strap will be unique and may have slight variations to the product photo. Shrunken Calf is an extremely soft and comfortable leather that makes for a perfect watch strap. This leather has excellent water resistance, resilient and easy to maintain. The textured grain gives it a timeless look and will show minimal wear over time. It is for this reason that this leather is used by many luxury brands for their handbags. All of our watch straps are entirely handmade one by one, utilising traditional leather crafting techniques. They are cut, saddle stitched and edge painted by hand to ensure that your strap lasts you a lifetime. All of our straps are lined with Zermatt leather, a hypoallergenic and water-resistant french calf leather. For an approximate wrist size guide:1. Extra small 95mm/65mm will fit a 5.0-5.5 inch wrist2. Small sized 105mm/70mm will fit a 6.0-6.5 inch wrist3. Standard size 115mm/75mm will fit a 6.5-7.5 inch wrist4. Large size 125mm/80mm will fit a 7.5-8.0 inch wrist