trezor-firmware/firmware/protob/types.options

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

HDNodePathType.address_n		max_count:8

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:1650

TxOutputType.address			max_size:36
TxOutputType.address_n			max_count:8

TxOutputBinType.script_pubkey		max_size:520

TransactionType.inputs			max_count:1
TransactionType.bin_outputs		max_count:1
TransactionType.outputs			max_count:1

TxRequestDetailsType.tx_hash		max_size:32

TxRequestSerializedType.signature	max_size:73
TxRequestSerializedType.serialized_tx	max_size:2048

MultisigRedeemScriptType.pubkeys	max_count:15
MultisigRedeemScriptType.signatures	max_count:15 max_size:73