About the SIZE of eyeballs

Due to I sold some glass eyeballs on EBAY, I measured the size every pair first and used the real one to took pictures not use the menufeature's catalog.
like these:

I think the size is always big problem, not only on EBAY even in Taiwanese bid, there are a lot of discusses in the past.

For buyers are easy to understand the difference of the size from different manufeatures, I request my friend--"Cloundland" to help me takes the picture, (really thanks!)

the left one is "Hand Glass Craft" from UK

the left second and third is VOLKS HG glass eyeballs

the fourth is  LAUSCHAER GLASAUGEN  from Germany

the right two are both handmade by China's manufeature

I wishes all dear buyers can understand the glass eyeballs are handmade by professional makers, but sometimes due to the  different technique, they will be different.

p.s. My English is not good enough, but I still hope I can answer and help, if there are any wrongs on my blog, please also tell me, thanks a lot.