What human cell has the largest surface area to volume ratio? And what is the ratio

The human cell has the largest surface area to volume ratio is Sperm cell or spermatozoa and its ratio is 1.55

Explanation:

Spermatozoa is a uni-flagellar motile sperm cell that basically determines the sex of an offspring. It moves from the haploid male gamete, its contributes in 1/2 nuclear genetic information to diploid.

The surface area of sperm cell is measured by micro-metric method or electron mircographs using stereo-logical method. While the volume will be measured by stereology or radio label volume exclusion method. The volume and surface area inversely proportional to cell size.