Shepherd Hardware 4 Pack 1" Threaded Felt Furniture Glides - 1/4" Stem Adjustable Leveling Feet for Wood, Tile & Laminate Floors - Tan (Includes Threaded Inserts)

Take that to the hardware store nuts and bolts aisle. There will be a sizer there, see which it screws into to figure out the size. Then order new ones. First example I found… 1/4” probably wrong size and def wrong color etc: https://www.amazon.com/Shepherd-Hardware-9908-Threaded-Furniture/dp/B00CXJRX7O/