Door Mats - Seashell Coir Welcome Mat - Shell Door Mat - Nautical Doormat This hand woven doormat showcasing a collection of beautiful seashells is constructed of durable, all natural coconut fiber, hand-stenciled with permanent fade resistant dyes. Measures approximately: 18"H x 30"L x 3/4" thick. For outdoor use only. Because each doormat is handmade of all natural products - sizes and colors will vary slightly.