Hi Venassa,

There is no standard sizes sections for handrails they are any size you want. They just have to be thick enough to not bend when leaning on them.

In general thickness is determined by the wood you have available with a minimum of 40mm, height or width can be anything from 50 to 150mm.

To leave space for fingers, when fixed to a wall the minimum distance between wall and handrail is 30mm.

Connection between handrails can be of several types:

Joint via posts:

Mitre or but joints

Curved or wreathed,

Each type has it qualities and disadvantages.

What sort of stair are you building?

best regards,

Ness