In case anyone is unaware of their existence, here are the links to the available genome size databases.
For a summary of the databases, see Gregory et al. (2007).
For a discussion about units of measurement in genome size, see here.
A summary of genome size ranges in various animals is available here.
A much smaller database of genome sizes that also includes some taxa besides animals, plants, and fungi is posted here.
For bacterial and archaeal (“prokaryote”) genome size data, see here and here and here.
For a list of completed and ongoing genome sequencing initiatives, see the Genomes OnLine Database (GOLD).
For vertebrate red blood cell sizes, see here.