Discrepancy?

1ZX3D2740335408568: declared 14x14x8, 9lb -> measured 15x14x9, 9lb

1ZX3D2740301595652: declared 14x14x8, 8lb -> measured 15x15x9, 8lb

1ZB8F652YW18287203: declared 20x14x7, 14lb -> measured 21x15x7, 14lb

1ZX3D2740331811549: declared 14x14x12, 12lb -> measured 15x15x13, 12lb

1ZX3D2740334868135: declared 20x16x14, 28lb -> measured 21x17x15, 28lb

1ZX3D2740321606352: declared 24x14x5, 4lb -> measured 25x14x5, 4lb

Plus other 20+ shipments