trezor-firmware/firmware/protob/types.options

HDNodeType.chain_code		max_size:32
HDNodeType.private_key		max_size:32
HDNodeType.public_key		max_size:33

CoinType.coin_name		max_size:17
CoinType.coin_shortcut		max_size:9

TxInputType.address_n		max_count:8
TxInputType.prev_hash		max_size:32
TxInputType.script_sig		max_size:256

TxOutputType.address		max_size:35
TxOutputType.address_n		max_count:8
TxOutputType.script_args	max_count:3
TxOutputType.script_args	max_size:16

TxOutputBinType.script_pubkey	max_size:256

TransactionType.inputs		max_count:8
TransactionType.bin_outputs	max_count:4
TransactionType.outputs		max_count:4

TxRequestDetailsType.tx_hash	max_size:32

TxRequestSerializedType.signature	max_size:80
TxRequestSerializedType.serialized_tx	max_size:1024