# size The contiguous memory footprint of `T`, in bytes. ``` static var size: Int { get } ``` ## Discussion A type’s size does not include any dynamically allocated or out of line storage. In particular, `MemoryLayout.size`, when `T` is a class type, is the same regardless of how many stored properties `T` has. When allocating memory for multiple instances of `T` using an unsafe pointer, use a multiple of the type’s stride instead of its size. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)