Desyne Store carries the most common rod diameters of 5/8”, 13/16”, 1”, and 1-1/2”. These will not have a huge impact on the weight capacity, as weight capacity has more to do with the mounting brackets and the number of brackets used., Recommendations: Desyne Store carries the most common rod diameters of 5/8”, 13/16”, 1”, and 1-1/2”. These will not have a huge impact on the weight capacity, as weight capacity has more to do with the mounting brackets and the number of brackets used., Recommendations:5/8” diameter – Sheer or linen curtains are recommended. The thinner rod will compliment the delicate and swift feel of these curtains., 13/16” and 1” – Cotton curtains are recommended. Cotton is very common and comes in a wide variety of looks and weights. 1” and 1-1/2” – Silk or Velvet curtains are recommended. A thicker rod will be a bit more supportive and the thickness will compliment the fuller look of the drapery.