Short shank ankle shown
If your machine usually takes screw on feet, then you could buy a short or long shank adaptor/ankle which will then enable you to fit clip on feet to your machine. These are smaller to store, much easier to change over and as this is the most common type of fitting, many more different types of feet are available.
Short shank adaptor/ankle £7 (3 in stock)
Long shank adaptor/ankle £7 (2 in stock)
Short Shank feet have a distance of 0.6 inches from centre of screw hole to bottom of foot.
They are more common.
Long Shank feet have a distance of 1 inch(25mm) from centre of screw hole to bottom of foot.
They are generally found on older machines from the 1960's and 70's