I don’t know why you would want smaller helmet, I personally can’t ride without the comfort of my full face helmet. But some skateboard helmets like this one that don’t have the foam protection, and they are lower profile. https://www.amazon.com/dp/B007CMDS6M/ref=cm_sw_r_cp_api_glt_fabc_D06M0PTMN3ZSENN22HHB