Great quality.  I was very impressed.  The bulbs are standard size.  I thought they were miniature which is my own fault.  This is industrial quality.  The string the bulbs screw into is very thick and well made. I was surprised!

***Now that I have actually put all of the bulbs in the string, ONLY HALF OR FEWER LIGHT UP!!***
Calling Wayfair today to ask about returning them.