Is it heavy enough to hang securely?

It is a small 4-inch resin figure, so it is light enough for standard ornament hooks and most tree branches. Resin is denser than plastic, so hang it on a sturdier branch.

Does the carousel pole move or spin?

No. The gold metal pole is a fixed part of the design that gives the carousel look. The horse does not rotate.

The body is 95% resin and 5% metal, with the metal in the pole. Resin lets the harness and feathering hold sharp detail.

About 4 inches tall, pole included. That is a mid-size ornament, larger than a miniature but smaller than a display figure.

Can it be used outside a tree?

Yes. It works on a wreath, a garland, a tabletop display or a carousel-themed shelf. Keep it out of damp outdoor conditions, since resin and metal can weather.