From Longman Dictionary of Contemporary Englishbig-bonedˌbig-ˈboned adjective a big-boned person is large without being fat
Examples from the Corpus
big-boned• Maura was tall, nearly five ten, and big-boned.• She was tall, big-boned and well-covered, with grey hair as coarse as a horse's tail straying from her mob-cap.• Among the four sisters, she was considered the plain one, with her tall, big-boned body and large-featured face.• Her big-boned body felt clumsy and she placed the tray on the coffee table with a loud clatter.• If you are big-boned or tall, avoid small jewellery, belts and handbags.• She was a tall, big-boned woman whose straight blond hair was faded, and tinged with gray. 