Thank you Peter
For this size candlestick I use the standard ones that you can get from most suppliers such as Axminster etc. Google candle cups and you will see various types in brass, chrome, steel etc. I also use glass t light holders for larger candles and for bigger ones again I either get spiked plates from Candle Cavern or make my own out of pewter. Again, Google candle plate and you will see a variety. There are some junky ones out there mind so cheap isn't always best. I have also been known to adapt various heat proof items sourced from charity shops, boot sales etc.
Pete