I’ve only had one rabbit from a young age to judge from, but at 14 weeks, he was roughly half of his final adult weight. However, different sized rabbits grow at different rates, so smaller breeds at 14 weeks may be closer to their adult size than my medium boy was at 14 weeks. But I’d say it’d still be somewhat close.

I have a holland lop he is about 10 weeks now and he was weighed to be 1.2kg today. He is expected to be about 5 or 6 lbs boy.

Wick is a Netherland dwarf and his weight has been plateaud since 7mo I want to say. ~1.7lb.

I have a 12 week old mini lop who is almost 2 pounds (850g). I expect him to be about 4 pounds or between 1.5-2kg when he’s fully grown.