A bedding or seating product comprising: a pocketed spring assembly comprising a plurality of parallel strings (26a, 26b) of springs including exterior strings and interior strings, each of said strings (26a, 26b) being joined to at least one adjacent string and being approximately the same height, each of said strings comprising first and second opposed plies of fabric and a plurality of pockets formed along a length of said string by transverse seams joining said first and second plies, and at least one spring positioned in each of said pockets; each of said springs (36, 62) having upper (38, 68) and lower end turns (40, 69) and a plurality of central convolutions (42, 70) between said end turns, at least one of the central convolutions (42, 70) having a barrel diameter (D1, D2) greater than the diameters of the other convolutions of the spring (36, 62); wherein each of said pockets of each of the exterior strings contains an edge spring, each of the edge springs having a first out-of-pocket barrel diameter and a first out-of-pocket height; each of the interior strings comprising outer pockets and inner pockets between the outer pockets, each of the inner pockets containing a core spring and each of the outer pockets containing an edge spring, each of the core springs having a second out-of-pocket barrel diameter and a second out-of-pocket height, characterized in that the first out-of-pocket barrel diameter of the edge springs being less than the second out-of-pocket barrel diameter of the core springs and the first out-of-pocket height of the edge springs being greater than the second out-of-pocket height of the core springs, such that due to the core and edge springs having approximately the same in-pocket height, the pocketed spring assembly has four sides of edge support, the pocketed edge springs surrounding the pocketed core springs. a pocketed spring assembly comprising a plurality of parallel strings (26a, 26b) of springs including exterior strings and interior strings, each of said strings (26a, 26b) being joined to at least one adjacent string and being approximately the same height, each of said strings comprising first and second opposed plies of fabric and a plurality of pockets formed along a length of said string by transverse seams joining said first and second plies, and at least one spring positioned in each of said pockets; each of said springs (36, 62) having upper (38, 68) and lower end turns (40, 69) and a plurality of central convolutions (42, 70) between said end turns, at least one of the central convolutions (42, 70) having a barrel diameter (D1, D2) greater than the diameters of the other convolutions of the spring (36, 62); wherein each of said pockets of each of the exterior strings contains an edge spring, each of the edge springs having a first out-of-pocket barrel diameter and a first out-of-pocket height; each of the interior strings comprising outer pockets and inner pockets between the outer pockets, each of the inner pockets containing a core spring and each of the outer pockets containing an edge spring, each of the core springs having a second out-of-pocket barrel diameter and a second out-of-pocket height, characterized in that the first out-of-pocket barrel diameter of the edge springs being less than the second out-of-pocket barrel diameter of the core springs and the first out-of-pocket height of the edge springs being greater than the second out-of-pocket height of the core springs, such that due to the core and edge springs having approximately the same in-pocket height, the pocketed spring assembly has four sides of edge support, the pocketed edge springs surrounding the pocketed core springs.