The chain mail is actually not that great looking when you compare it to other 1/6 scale medieval figures from brands such as CooModel.
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From what I've researched, the chain mail they're using on Geralt is actually one of the cheapest ones you can get. Chain mail is one of the most expensive things to produce at this scale, the smaller the rings, the higher the production cost, I know this because I looked into several chain mail options when LIM and Master Team had plans to make a 1/6 scale Geralt. Some of the prices for these are actually insane. The cheapest chain mail looked almost exactly like PureArt's and it's all machine made, which means that if you want it to be smaller you'll need to invest in better equipment or go with handmade chain mail, which is a laborious and expensive process.