Figure 1:

Figure 2: Select Box Properties

IDElement ID (By declaring as "country", a corresponding database table column "c_country" will be created)
LabelElement Label to be displayed to end user.
Options (Hardcoded)Select Box options
Or Choose Options BinderSelect Box options to be populated using Options Binder plugin.

 

Screenshots taken from http://localhost:8080/jw/web/console/app/crm/1/form/builder/crm_account