I'm estimating roughly 90-ish characters in a row, roughly 40 rows encoding the spike protein. So about 3600 base pairs. There are 3 base pairs per amino acid, so That's 1200 amino acids.

For comparison, the smallest chain that they technically call a protein is 100 amino acids that's an arbitrary limit to separate proteins from enzymes. So this thing isn't tiny tiny.

But Titin (also called connectin), a giant protein responsible for passive elasticity in mucles, is ~27,000-35,000 amino acids. So this thing isn't even close to the biggest proteins out there.