An effective way to do this, especially for small samples, is on a beaded chain. The chain can be conveniently hung in a sample library in a designers office, or behind the counter in a distributor's showroom. They take up less room than a wall-hung display board. They are usually inexpensive to produce and ship in a compact package. Customers can readily remove a single piece if needed for further examination or a mock-up. And the chain keeps your samples together, so you can keep your act together.