Copy the design to a transparent film and then transfer it to the felt sheet.

Embroider the transferred design on the felt sheet using No. 25 embroidery thread and wool roving.

Once all the design has been embroidered, trim the felt sheet leaving 5 mm allowance from the design outlines.

Secure the embroidered piece on the center of the t-shirt (by pinning or applying a thin coat of glue on the back) and sew it on using blanket stitches.