
True miniature size is usually in 1/12th scale and may be called doll-house size.
I have one almost miniature teapot and matching service. It is cream trimmed in gold. The teapot is 2" tall, the covered sugar 1 ½", creamer 1", cups ¼" tall x ¼" diam., saucers ½’ diameter. Tray is 3 ¾" diameter.

This tiny tea kettle is made of tin and has a brass handle. It is ¾" tall, including handle.

Child or toy size is intended to be used by children and are in scale to their statures.
I have four teapots in this category.
Here is an apple-shaped teapot just right for play use by a child.

I found this blue and white tea set in a local gift shop. Measurements are: teapot 3 ¾" tall, sugar and lid 2 ½", creamer 1 ¾", cup 1 ¼" tall x 1 ¾" diam, saucer 2 ¼" diameter.
This blue and white teapot (4 ½" tall) is a consignment shop find, along with the matching 2" tall creamer…

and three matching cups (1" tall, 2" diam.) and saucers (3 ½" diam.)
This silverplate teapot with creamer, sugar and tray is by Godinger. The teapot is 4 ¾" tall, sugar and lid 3", creamer 2" tall, tray 10" diameter.

I would say doll size is in between miniature and child size.
At 3 ¼" tall this white porcelain with pink bow, is trimmed in gold. So is the other in blue and white stripe with red roses.
This 2 /4" tall teapot is white with blue flowers all over, a chintz pattern.
At Christmas time all the these mini tea wares are featured with dolls and bears as part of the holiday décor.
For links to other participants in the Tea Blog-a-Thon, please visit La Tea Dah at Gracious Hospitality.