Yes, the [Ethereum Yellow Paper (YP)](https://github.com/ethereum/yellowpaper) and related https://ethereum.stackexchange.com/q/268/42.

Here are the main pieces of a block and the YP has all the sizes:

>    4.3. The Block. The block in Ethereum is the collection of relevant pieces of information (known as the block header), H, together with
> information corresponding to the comprised transactions, T, and a set
> of other block headers U that are known to have a parent equal to the
> present block’s parent’s parent.