An adjustable tray for a merchandise display system comprising: a floor having a floor surface for receiving products thereon and a bottom panel; a retainer for limiting movement of products received on the floor surface; a first adjustable divider comprising a first wall and a second adjustable divider comprising a second wall for guiding products along the floor surface; and at least one cam having multiple notches, wherein the cam is rotatably attached to an underside surface of the floor and is configured to prevent or allow movement of the first adjustable divider and the second adjustable divider; wherein the first adjustable divider comprises a first panel extending perpendicularly from a bottom of the first wall toward the second wall and the second adjustable divider comprises a second panel extending perpendicularly from a bottom of the second wall toward the first wall; wherein the first adjustable divider and the second adjustable divider are configured to move laterally with respect to the floor such that the spacing between the first wall and the second wall is adjusted to accommodate various dimensioned products; wherein the floor is positioned between the first wall and the second wall above the first panel and the second panel, the first panel and the second panel being configured to move laterally under the floor; the first panel and the second panel are movably positioned between the floor and the cam and are configured such that lateral movement of the first and second adjustable dividers (1030a, 1030b) causes rotation of the cam; characterised in that the floor further comprises a support extending from the bottom panel of the floor, the support having a portion configured for placement in a notch of the cam, wherein placement of the portion in a notch of the cam prevents rotation of the cam and prevents movement of the first and second adjustable dividers (1030a, 1030b). a floor having a floor surface for receiving products thereon and a bottom panel; a retainer for limiting movement of products received on the floor surface; a first adjustable divider comprising a first wall and a second adjustable divider comprising a second wall for guiding products along the floor surface; and at least one cam having multiple notches, wherein the cam is rotatably attached to an underside surface of the floor and is configured to prevent or allow movement of the first adjustable divider and the second adjustable divider; wherein the first adjustable divider comprises a first panel extending perpendicularly from a bottom of the first wall toward the second wall and the second adjustable divider comprises a second panel extending perpendicularly from a bottom of the second wall toward the first wall; wherein the first adjustable divider and the second adjustable divider are configured to move laterally with respect to the floor such that the spacing between the first wall and the second wall is adjusted to accommodate various dimensioned products; wherein the floor is positioned between the first wall and the second wall above the first panel and the second panel, the first panel and the second panel being configured to move laterally under the floor; the first panel and the second panel are movably positioned between the floor and the cam and are configured such that lateral movement of the first and second adjustable dividers (1030a, 1030b) causes rotation of the cam; characterised in that the floor further comprises a support extending from the bottom panel of the floor, the support having a portion configured for placement in a notch of the cam, wherein placement of the portion in a notch of the cam prevents rotation of the cam and prevents movement of the first and second adjustable dividers (1030a, 1030b).