C.S. Osborne Closed End Thimble. Ideal for sewing and repairing sails, canvas, leather and similar materials. Closed end design. Nickel plated brass. Made in USA. Size : 11 Inside diameter : 11/16" Other sizes available in our shop C.S. Osborne & Co. is a manufacturer of specialized hand tools designed exclusively for upholsterers, auto trimmers, awning and canvas workers, furniture makers and other professionals in related trades. For generations, the family run business has always taken great pride in engineering the highest quality tools and offering our products both here in the United States and abroad. C.S. Osborne produces the most extensive line of custom tools available -and we guarantee that our tools will deliver excellent quality and superior performance.