What is the longest emoji by code points?

The family emoji 👨‍👩‍👧‍👦 is a 7-code-point ZWJ sequence: man + ZWJ + woman + ZWJ + girl + ZWJ + boy. In UTF-8 it's 25 bytes for a single visible glyph. Flags for subdivisions (like 🏴󠁧󠁢󠁥󠁮󠁧󠁿 for England) can be even longer — 7 tag characters + a base flag.