With the garage door unplugged and clamped in the open position measure the width of the opening at the top of the opening where the door seal will be nailed.
How to install weather stripping around garage door.
How to install garage door weather stripping.
This flexible weather seal limits air flow into the garage resulting in a more comfortable environment when your garage door is closed and helping keep dust and debris outside the garage.
You can usually find the types of door weather stripping shown here at well stocked hardware stores and home centers.
Installing garage door weather stripping also known as astragal fills the gap around the edge of your garage door.
Stop energy wasting air leaks around entry doors by installing a weatherstripping kit with a foam flange or vinyl bulb.