I am in an interfaith marriage, and I have a small business making and selling kippot. I have a client who has asked me to make a matching tallit for an upcoming special event. My understanding is that a tallit is a more significant religious item. I believe a tallis is different, because you say a blessing(ish?) when you tie the tzitzit. Also a kippah is a head covering and not inherently special.
I am certainly, technically able to make one, but I am uncertain as to whether my doing so would be problematic, as I am not Jewish. According to halacha can a gentile make one with tzitzit? If not, can a gentile make one without tzitzit and have a Jew attach them?