The most popular versions of The Night Sky planisphere are the large and small plastic charts. These versions are made in the USA using durable plastic facing for the front and back and are secured with no-corrosion brass rivets. These planispheres are built to last; you will probably go through several telescope upgrades in your lifetime but will never need to upgrade your planisphere.
This version is for 20 to 30 degrees.
Large Plastic The Night Sky Planisphere measures 10" high x 8 1/2" wide with 8" dia.