I can't think of how one might use the two figures on horseback without the horses, but the one on the right can make a splendid little detail. How much of the surrounding you use will depend on how you crop the image. Since the figure doesn't imply a holiday or occasion, you can use him for anything!
Left Figure: 1.375" x 2.75" (3.5cm x 7.0cm)
Middle Figure: 1.625" x 3.5" (4.1cm x 8.9cm)
Right Figure: 1.75" x 3.25" (4.4cm x 8.3cm)