Yes, this is possible to embroider a hat by hand. If you have some experience in stitching and have some kits then you can embroider a hat by hand. You can see lots of embroidery designs in hats & caps. When you see any customized design or print on hats its looks beautiful & trendy. You can make it more artistic by stitching. If you want to embroider a hat by hand you need the following items - Hand embroidery thread which has at least 6 strands of thickness skinny eye needle where you can put a thread of 3 strands 3mm thick Crafting foam Thread locker Embroidering a hat by hand will take a lot of hours that rely on your skills & experience of stitching. Though this is not an ideal option for embroidery complicated design by hand if you have no other option then you can go for it.