Plastic drawer guide from 1980 dresser. Need to replace four. Drawers don't pull out without falling out anymore.

Hello, thank you for posting! 

Please compare your current drawer guide with our 32-031. The track opening measures 1-5/32" W x 5/16" H. Please let me know if you have any questions. 

Alternate image for 32-031

Side view and measurement for 32-031 Drawer Guide