Excess molar volumes V-E for binary liquid mixtures of an (1-alcohols + 2,5-dioxahexane or 5,8,11-trioxapentadecane or 2-isopropoxyethanol) have been measured as a function of compositions using a continuous-dilution dilatometer at 298.15 K and atmospheric pressure over the whole concentration range. The 1-alcohols were methanol, 1-propanol, and 1-pentanol. The V-E for each of the mixtures studied are negative with the exception of 1-pentanol + 2,5-dioxahexane, and + 2-isopropoxyethanol and change sign for 1-propanol + 2-isopropoxyethanol over the whole composition range. For each case, the V-E increases as the chain length of the 1-alcohol increases.