This is a fukuro obi - wide for the entire length, plain on the backside and a patterned only on the front. Usually, there is a one yard "blank" section on the front, as is common with contemporary fukuro obi, where some cost can be saved by leaving it blank where the first wrap layer of the belt portion occurs, since it doesn't show to the public.

If you'd like ideas on how to decorate with an obi, we recommend this book - "Design with Japanese Obi" - which you can purchase on amazon.com.