VOLUMINOUS

[adjective] [formal] - (of a piece of clothing) large and consisting of a lot of cloth, or (of a piece of writing) long and detailedHer voluminous silk dress billowed out behind her.She was wearing a very voluminous shirt so I didn't realize how plump she'd become.Have you read McClelland's voluminous account of his life and work?A record of their relationship exists in a voluminous correspondence that lasted over 20 years.