The micellization characteristics of nonionic surfactants of the type C7E26 and symmetric C7E26C7 where C-7 = the heptanoic acid (C7H14O2) Or the cyclohexanecarboxylic acid (C7H12O2) group is investigated. Structural formulas being nearly the same, the linear and cyclic analogues possess roughly the same molecular weights and hydrophilic-lipophilic balance (HLB) values. Surface tension and fluorescence experiments provide information on the thermodynamics of micellization, interfacial adsorption, mean aggregation number, etc. Comparisons are made between linear and cyclic analogues and between diblocks and triblocks. The results indicate that, compared to their Linear counterparts, amphiphiles with cyclic hydrophobes possess higher CMC values and the micelles formed are less compact with lower aggregation number. A qualitatively similar trend is seen between diblock and triblock surfactants. The results for triblocks are consistent with a micellar structure in which the PEG chain folds to insert both the terminal hydrophobic segments into the micellar core.