is there an optimum block size for staking?
Hi pescadorloco69.
Age is more important than size of the blocks for the staking amount. You could send all the coins to one address to increase the size but, the trade off of losing all the acquired age you might already have is a decision you will have to make. I know not of an optimal size but only that larger is better but, again, less important than age.
Unless you just recently acquired your Sterlingcoin, your best bet might be to retain your age. That said, I do not know the present size you are talking about. If you have extremely many of small sizes, you will want to consider that also.
Mind you that all of this only plays into the frequency of payments. More age and to a lesser degree more size, and subsequently weight, only means you will get payments more frequently. But the payments, frequent or not, will always total 5.5 % annual.
I hope that helps you reach a decision pescadorloco69.