This a single 30mm d6 die that is part of the Gemini line that is colored purple and steel (the color, not the actual metal) with white pips. Thirty millimeters is a little larger than 1 inch.

The particular die in the photo are just one of the dice that I have ordered. Thus, the actual die that you receive will be the same colors but may have slightly different markings. No two dice will be exactly identical.