Based on this product's specifications, here are some alternatives and similar models
Apple Sport Band for 46mm Smartwatch, Clementine, M/L
Summary description:
The Apple Sport Band in Clementine is a durable and lightweight accessory designed for 46mm smartwatches. Crafted from high-performance fluoroelastomer, this M/L size band is soft, flexible, and comfortable for daily wear or athletic activities. It features a secure pin-and-tuck closure and fits wrist sizes ranging from 160 to 210 mm, ensuring a perfect fit for your device.