Do you want a different size than usual? Why not make it yourself? It's easy and fun and even cheaper than buying it in a store.
Roll out a piece of clay between some plastic foil with a rolling pin or glass bottle. Make the pieces of clay a bit thicker if the clay needs to stand. Cut the desired size with a knife and ruler. First cut the strips and then cut the squares. Let dry. Paint the squares for example with diluted (with water) beige / light brown acrylic paint and let dry. Paint with black paint and a liner brush or black marker the letters with the small numbers. You can use the examples below. These letters are also nice for names, births, between vacation pictures or other holidays. It's that easy to create a special gift. Lots of Scrabble fun!