Thanks John. It is the diameter that is more important at the moment.
At 40mm diameter I will need at least 2" (sorry 50mm) to drill the hole to hold them. This makes my design a little chunky. I may well just use small upright candles instead which is a shame as the wax will run onto the holder, but then this could add to the charm.
Thanks Adam, I was also looking at forstner bit sizes and wondering whether the 40mm would be big enough.
My design is a simple scrollsawn pattern of NOEL (stylised with the help of MS Word- WordArt) which will either lie flat with the tea light candle in the centre of the O or upright with a thin straight candle on the foot of the L. I may well do both. These will be painted by my 3 year old so may well just be cut from ply. If time permits I will try and do some in oak, beech and walnut just to see how the scrollsaw copes with the harder wood.
I make quite a lot candle holders, mainly from scrap timber.
Use a 38mm Forstner for the T-Candles, and depth according to what candles i buy. Generally use the 17mm depth. Find it extremely difficult to get 38mm bits.
For the longer candles i use a 22mm Forstner.