Lynn,
Those are getting close. You want at least a couple sets of true leaves although I have transplanted some at rthat size when the pot was VERY crowded. Wait for a bit of drizzle to do the transplanting and you'll have great success.
I have found that if the seedlings are growing VERY densely it is wise NOT to try to pull them apart to single plants but plant little clumps and then sort them out as they get a good bit bigger. Each time i have this happen iu say "i'm going to spread the seed out more" but i still get some that are way too densely planted.
Good luck!
Kevin
