Simplify the following text for a Grade 5 native English-speaking person.
Original: White mustard seeds are hard round seeds , usually around 1 to 1.5 millimetres in diameter , with a color ranging from beige or yellow to light brown .
Simplified: White mustard seeds are hard and round , usually around 1 to 1.5 millimetres , with a color forming from beige or yellow to light brown .