Mackinac Island is about 16 times smaller than British Virgin Islands.

British Virgin Islands is approximately 151 sq km, while Mackinac Island is approximately 9.54 km² (3.68 sq mi), making Mackinac Island 6.32% the size of British Virgin Islands.
Tip: This to-scale comparison of British Virgin Islands vs. Mackinac Island uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.