Determine the length of your bridge. You should consider how long you want to make your bridge before you even go shopping for supplies. There are many different sizes of popsicle stick that will be available at your local grocery or craft store. You may want to:
Lay out a yardstick on your work space.
Note the approximate length of your bridge.
Lay your yardstick crosswise to note the width of your bridge.
Estimate the amount of popsicle sticks based on these dimensions, and the size of popsicle stick you decide on using.