KOK Doll Collection has added smaller sizes of eyes to their store.
From the retailer:
Thank you very much for your love and support to KOK DOLL COLLECTION.
Now we bring size 6MM for following glass eyes:
Cat eyes: CA-01, CA-02,CA-03,CA-04.
8.5 MM eyes: A-01,A-02, A-04,A-05, A-06.
9MM eyes: A-03 , CA-01, CA-02,CA-03,CA-04.
Link: items in store on eBay!