Product Name: Curtain Rollers; Material: Plastic Color: Black, White; Overall Size: 33 x 20 x 14mm (L*W*T) Roller Diameter: 13mm; Hole Diameter: 6mm Weight: 40g Package Content: 30 x Curtain Rollers Features Material: Plastic Color: Black, White Weight: 40g Overall Size: 33 x 20 x 14mm/ 1.3" x 0.79" x 0.55" (L*W*T) Roller Diameter: 13mm/0.5" Hole Diameter: 6mm/ 0.24" Description These rollers are made of white and black plastic, you will never have to worry about staining your beautiful curtain. Check the size: height Curtain Rail Width > 15 mm / 0.59 inch, Curtain Rail Width > 22 mm / 0.87 inch, 13 mm / 0.51 inch > Curtain Rail Open Mouth > 6 mm / 0.23 inch, You can choose this product to fit your curtain rail.