Fits perfectly in an All-Clad D5 3 quart saucepan. The D5 lid supplied with the 3 quart saucepan also fits perfectly on the steamer insert.Design, material and build quality are all superb. Lighter in weight than All-Clad pans designed to go directly on the stove because it’s an insert, not a pan.The pressed-out lip that allows the steamer to sit inside a pan is shaped such that it is fairly easy to clean. Hard to describe, but the lip is more open on the top and that makes it easier to clean.I agree with the reviewer here who highlighted that the number and size of the steam vent holes is correct to allow sufficient steam penetration without letting in too much moisture which would make vegetables, Dim Sum or other steamed items too soggy. To achieve that balance obviously required design study and correct engineering. All-Clad appears to have sweated the details on the design of its steamer insert just as it has on many of its other well-designed and well-regarded cooking items.More elegant, more effective and easier to use than those ubiquitous stainless folding basket steamer inserts.Extends the utility of one’s already-owned D3 or D5 3 or 4 quart saucepan.Inexpensive by All-Clad standards ?.I disagree with reviewers who feel that All-Clad has compromised its standards by producing this item in China. The quality of the steamer insert compares to the quality of other All-Clad premium items without being OVER-built just to copy the pan build.