Some ones are big, some ones are small, and they taste different, but all of them are juicy and delicious. Some ones are big, some are small, and they taste different, but all of them are juicy and delicious.

Some ones are big, some ones are small, and theysome taste different, but all of them are juicy and delicious. Some are big, some are small, and some taste different, but all of them are juicy and delicious.

"and they taste different" is a little confusing in English because "they" could be referring to the big oranges, or the small oranges. By saying "and some taste different", you are instead referring to the collection of oranges you bought and how some of them taste different but not because of their size. Does that make sense?

Some ones are big, some ones are small, and they all taste different, but all of them are juicy and delicious. Some are big, some are small, and they all taste different, but all of them are juicy and delicious.

Some ones are big, and some ones are small, and they. They all taste different, but all of them are juicy and delicious. Some are big, and some are small. They all taste different, but all of them are juicy and delicious.

Some ones are big, some ones are small, and they taste different, but all of them are juicy and delicious. Some are big, some are small, and they taste different, but all of them are juicy and delicious.

"ones" is implied here, and sounds better omitted entirely.