Excess molar volumes (V-m(E)) at 298.15 K and atmospheric pressure for 2-methoxyethanol or 2-butoxyethanol + 2,5-dioxahexane, + 2,5,8-trioxanonane, + 3,6,9-trioxaundecane, + 5,8,11-trioxapentadecane, or +2,5,8,11,14-pentaoxapentadecane, or for 2-ethoxyethanol + 2,5,8-trioxanonane, + 3,6,9-trioxaundecane, or + 5,8,11-pentaoxapentadecane have been obtained from densities measured with and Anton-Paar DMA 602 vibrating-tube densimeter. They are usually small in absolute value. It is due to a compensation between positive and negative contributions to the excess molar volume. For example, free volume effects present in solutions with the pentaether are compensated by the positive contribution to V-m(E) from the rupture of dipole-dipole interactions between ether molecules. (C) 2003 Elsevier Science B.V. All rights reserved.