By jade tree do you mean Crassula Arborescens? If so it's a succulent and I am not sure that you can reduce leaf size like you can with other trees by defoliating. But you should only defoliate healthy growing plants.

Let it grow and become established before you go trying to transplanting it. Also from some reading I have been doing succulents are transplanted a little different than other types of plants.

It doesn't hurt anything to let it grow until you have a healthy plant you can work with. Since you're stuck indoors see if you can get your hands on Bonsai in Your Home by: Paul Lesniewicz. It's a goog bonsai book for those that want to work with tropical material.

Although, all trees sold as "indoor bonsai" will benefit from being outdoors during spring, summer and getting some sun, wind, and rain. So if you can do that for your trees they will reward you by being healthy and happy.

Good luck!

Yes I believe it is a Cassula Arborescens. At the website bonsai4me.com it says "Natural leaf size is 1-2" but can be reduced to as little as 1/2" with regular pruning." It very well could be wrong but if leaf reduction is possible I would like to know how I accomplish it. Thanks for the help. ^_^

Here is a link, that talks about it. The info you can apply to your tree too.

Also, take into consideration the amount of light your plant gets and how that will affect leaf size. The more light the smaller and compact the leaf growth will be. I have a tropical hibiscus topiary that had leaves around 5 inches long, this spring/summer I put it out in the yard in full sun and it dropped the leaves and grew new leaves around half the original size.

Also there are some Jade Trees that have naturally smaller leaves that you may like. Portulacara Afra has nice trunk color and smaller leaves.

Here is a link that might be useful: Here is a link to a previous thread on this.