# Tuning the signature size of Sphincs+

If I only need a small number of signatures (perhaps $$2^{10}$$) for the lifetime of my key pair, how would I calculate the consequent signature size?

Unfortunately managing state for an LMS or XMSS signature would be an issue, so that's not an option.

• That computation is surprisingly nontrivial. – poncho Aug 6 '19 at 15:30