Growing flowering quince for fruit

Here's the photo I promised. Four jars of 'flowering quince marmelade'. The fruits are growing in my gardens (front and back yard and allotment plot) since I bought 1 bush a few years ago that had fruits on it. I planted the seeds (from those fruits), and they did very well! They are the red-flowering kind. I don't know how large the bushes will become, now they are only a meter high.