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		Drop size distribution   Droplet diameter     A glory from monosized droplets has four or more rings. A distribution of droplet sizes causes the rings to become less distinct. A variation of 10%* reduces their contrast and all but the innermost ring is washed out when the variation is 20%. * In the simulations the cloud droplets have a Normal size distribution about their mean. The percentage figures are standard deviations.       Like the corona, glory size is inversely proportional to the droplet diameter. Estimate the glory diameter and hence the droplet diameter using the 'outstretched hand' rule. The thumb and little finger tips of a fully outstretched hand held at arm's length extend roughly 20°.