This product has been a life saver for me for several years! I give this to students at the beginning of our measurement unit. It includes all customary and metric equivalencies for length, weight/mass, and capacity. It also includes units of time. It shows what which units are greater in their respected category as well as a method for converting to help students that don't fully grasp how to convert units. (Label which unit is large and which unit is small, see how they are related, and then multiply or divide.)
I highly suggest that you DOWNLOAD THE PREVIEW!
I also included practice problems for converting which is helpful when teaching the method. (I copy these on the back of the measurement reference sheet.)