Smallest Chess Set?

This might not have the allure of Most Hamburgers Eaten in Three Minutes or Most Pool Balls Held In One Hand, but it's still impressive.

Smallest chess set - Guinness World Records (2:02) • 'Artist Ara Ghazaryan has an exceptional eye for detail, particularly with his latest work, the world’s smallest handmade chess set'

For more about the set, see Check out the world’s smallest handmade chess set (guinnessworldrecords.com):-

Made on an incredibly minute scale, the entire board with accompanied pieces measures a total of 15.3 x 15.3 mm (0.6 in x 0.6 in), a size that amounts to be smaller than a U.S. quarter coin.

Is this really the smallest? Guinness also lists the Largest chess set: 'measures 5.89 m (19 ft 4 in) on each side'. Last year on this blog we saw Chess with Walkie-Talkies (August 2016), which beats the Guinness record holder by a country mile. Hasn't someone already constructed a small chess set molecule by molecule?