What weight is overweight for a big boned 10-year-old?

For a 10-year-old (or a person of any age) weight is related to height and body composition rather than age. For more information about weight in relation to height, and to see charts showing the distribution of weights and heights of children at various ages, please see the page link, further down this page, listed under Related Questions. Alternatively, please feel free to ask the question again and include more detail.