The pattern is seven inches long.
The insert hole is best drilled out with a 2 1/2" forstner bit. They are somewhat expensive at that size. The mounting hole can but cut on your scroll saw. Just take your time and slightly undercut the hole. Better to be a bit small than too large. You can open the hole up by sanding. If you get the hole too big you will have to wrap the clock insert with tape until it is a snug fit.
If you are not familiar with www.klockit.com, it is a wonderful site to order clock supplies.
I get email from readers asking me to send older patterns that they have seen on my blog. Just a reminder that all the patterns are always available in my free online catalog on the blog. The link to the catalog is in the left column. All the patterns are in categories so they can be found without too much searching.
DVD and the 2013 update DVD at this link. DVD #1 is $20 and contains over 1,100 patterns. The 2013 update DVD is $7.50 and has another 178 patterns. The 2014 update DVD is $7.50 and has another 223 patterns.