Confusion regarding the difference between LISS-4 spatial resolution and the pixel size or cell size?

Actually I am working with LISS-4 data. I am using the cell size of pixel for some volumetric calculation. But I am confused about the cell size of it. In Resourcesat-2 handbook it is given that the spatial resolution of LISS -4 data is 5.8 meters ([RD13]_Resourcesat-2_Handbook.pdf) but when I have opened the data its shows that the pixel size is 5 meters .

Thanks in advance.