The urban square is one type of urban public space which has a long history in western countries. The square in China is a more recent concept, and designing squares seems dominated by the concept "the bigger city, the bigger square". This has triggered the author to start a research on scale issue of squares. The theoretical work is on the basis of previous studies of spatial scale and square scale, combining the theory of human dimension from physical and psychological factors. The absolute scale of a square is constituted by its size, while the relative scale reflects the square’s power of attraction. In the investigation of the six sites the size of the square, the size of subspaces, the height and width of buildings in the surroundings is measured and the manner of enclosure and space division is observed, thus the architectural field is calculated and evaluated. The situation of how many people come to the squares and how the spaces are used is observed. A comparison and analogy between each of the two squares ofthe same type is conducted in the discussion chapter. The scale of three types of squares in the Scandinavian capital city Copenhagen is looked at: civic squares, traffic evacuation squares, leisure and entertainment squares. The perspectives of absolute scale and relative scale are applied . Six existing squares in Copenhagen city are chosen as sites for the field study. From the research, the major findings are that all the studied squares are in quite small absolute scale, however, their relative scale appears to be large, mainly due to the lack of consideration on solutions for events of severe weather. At last, some suggested solutions to improve this problem is given by the author, aiming at human needs on spatial scale and the concrete issues found in the investigation.