Only four islands, mostly uninhabited, had decreased in area despite local sea level rises of almost five inches in that time, while 23 stayed the same or grew.
Seven islands in Tuvalu grew, one by 30 per cent, although the study did not include the most populous island.
In Kiribati, the three of the most densely populated islands, Betio, Bairiki and Nanikai, also grew by between 12.5 and 30 per cent.
Professor Paul Kench, of Auckland University, who co-authored the study with Dr Arthur Webb, a Fiji-based expert on coastal processes, said the study challenged the view that the islands were sinking as a result of global warming.
"Eighty per cent of the islands we've looked at have either remained about the same or, in fact, got larger.
"Some have got dramatically larger," he said.
https://www.telegraph.co.uk/news/worldnews/australiaandthepacific/tuvalu/7799503/Pacific-islands-growing-not-shrinking-due-to-climate-change.html