I looked at the combinations of surface mount and thru-hole and decided that it probably makes sense to go with the thru-hole layout. This allows me to offer a kit of parts that more people can take advantage of.
The thru-hole board ends up being 1.25" x 1.05".
The all SMT version is 1.05" x 1.0", so not a ton smaller.
Click on graphic to expand.