disklocks and security bits

Please can anyone please tell me what size disklok I need to fit the wheel of my new1997 defender, it's the one without the square and four spokes, its more like a discovery 1 steering wheel.
I have seen them advertised as39cm / 42cm / large / sizes mentioned but don't know which size I really need.
Also I have seen a yellow box that fits over the three pedals,like the clutch claw only bigger, as I have been told the problem with the smaller clutch claw is they saw the end of the pedals off too remove it, anyone know of the bigger boxy one that covers all the pedals please.

42cm large... the box is called pedal safe T lock

Ever thought of getting a tape out and putting it to the steering wheel ???

300tdistu said:

Ever thought of getting a tape out and putting it to the steering wheel ???

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Yes I did think of doing this, but was more thinking if the steering wheel boss was a factor. I had to take in, when measuring the wheel, as to whether the disk would fit over the curve of the center boss you see.
And also some were listed in cm size and others were listed as large medium and small, and some were silver and some were yellow.

lanny man 90 said:

42cm large... the box is called pedal safe T lock

Click to expand...

Many thanks..

For anyone interested in the bigger pedal box cover here is a link Shirefabrications -