Think about the hours the strap needs to handle, not just the first minute you put it on. A bass used for a short home session has different needs from one worn through rehearsal, a recording day, or a long live set. If a current strap starts feeling sharp after three songs, slides when you move, or leaves the bass just out of reach, say so. Those details help determine whether the answer is a different width, more adjustment, a padded shoulder section, or a change in playing height.
A photo helps show the body shape, finish, strap-button layout, and hardware color. A second photo with the bass in playing position can be useful when you already know how low or high you like it to sit. Then add the details that are already clear to you: fixed or adjustable fittings, leather color, a quieter tooled border, a hand-beaded panel, or a piece that takes a more visible role onstage. You do not need a finished drawing before getting in touch.
The current guitar strap collection is a good place to see the range of hand-finished leather, beadwork, and shoulder shapes. Browse for direction, not a copy. A custom strap works best when it takes the practical lessons from your own bass and brings in the visual details that belong with it.