
The inside diameter (ID) of the "lid" is approximately 9.27 inches and the instant pot outside diameter (OD) advertised as a fitting is approximately 9, 39 inches. So this lid is about 1/8 inch smaller for the pot. For example, I've included a photo of an inverted lid on a saucepan. The outside diameter of the lid is very similar in size to the pan, so the wall thickness of the lid was not considered in this design. I suspect someone found an existing silicone lid that slides over the top of a pot and almost fits. Considering the price of a new mold is quite high, did they just go with this unfortunate choice? It matches one of my metal kitchen bowls. And one of my metal kitchen lids is way better than this one!

Amazon Basics Enameled Cast Iron Covered Dutch Oven, 7.3-Quart, Red
36 Review

3 Qt Instant Pot Accessories Set Compatible With 3 Quart InstaPot, Mini Accessory Pack Includes Sealing Ring Steamer Basket Springform Pan Egg Rack Trivet.
31 Review

COTEY 3.5" Set Of 4 Egg Rings With Wooden Handle - Large Round Molds For Frying Eggs And English Muffins - Griddle Cooking Shaper For Perfect Breakfasts
39 Review

SENSARTE Nonstick Griddle Grill Pan Set - Reversible Cast Aluminum Griddle, Perfect For Indoor Stovetop Or Outdoor BBQs - 2 Burner Griddle, Portable And Convenient - 19.5" X 10.7" X 2, Gray
31 Review

AmazonBasics Silicone Baking Mat Sheet
48 Review

100-Pack Of Disposable 18-Inch Piping Bags For Cake, Cupcake, And Cookie Decorating - Perfect For Icing And Frosting!
41 Review

PME Scriber Needle Modelling Tool, For Cake Decorating, 5.7-Inch
38 Review

2-Pack European Grade Silicone Bunte Cake Pan Set - Non Stick Bakeware Fluted Tube Mold For Jello, Gelatin & Cakes | 9 Inch Baking Pans | Aokinle | BPA Free
38 Review