How to Identify Your Primo Oval Size If you've owned your Primo for years, bought it used, or simply aren't sure whether you have a Junior, Large, XL, or XXL, your stock cooking grid is one of the easiest ways to identify your grill. It only takes a quick measurement to find your Primo Oval Grill size. Remove one of the D-shaped cooking grids and measure outside-to-outside across the straight edge. Then compare your measurement to the chart below. Primo Flat-Edge Shop Junior ~ 13-1/2" Junior Accessories → Large ~ 15-3/4" Large Accessories → XL ~ 18-1/2" XL Accessories → XXL ~ 20" XXL Accessories → The measurement need not be an exact match but should be within a 1/4". This should work for the various cooking grids Primo made over the years. How to Measure: Measure the straight edge of one stock D-shaped cooking grid from outside edge to outside edge. Do not measure along the curved edge or across the ceramic grill body. Measurements are approximate. Note: Primo no longer officially uses the 200, 300, 400 and 500 model identifiers for its Oval grills. Current model names are Junior, Large, X-Large and XXL. Missing the grids? Give us a call or send us a message. We can help identify the Primo Oval by other methods. Primo® is a registered trademark of Empire Comfort Systems. Ceramic Grill Store is an independent retailer of genuine Primo products and aftermarket grill accessories and is not affiliated with, endorsed by, or sponsored by Primo Grills.