Embroidery hoops and frames are tools used to keep fabric taut while working embroidery or other forms of needlework. The tambour frame embraces an outer ring A and an inner ring B, the one fitting loosely within the other, so as to permit a piece of cloth or other suitable material. This technique, named after the frame or tambour used to stretch the fabric, uses ... as you work, wrap a narrow fabric tape around the inner ring to provide gripe.
The inner ring diameter is about 16cm and approximately 6.3inches