The average size of the product is 35-40 cm. Sunflowers, also known as helium flowers, are a durable type of flower. They are one of our designs you can choose to delight your loved ones and crown your most special moments. Sunflowers are associated with happiness, loyalty, and admiration, making them a symbol of love and affection. Their yellow color evokes spring, luck, and happiness. Sunflower care: 1. Change the water every three days with chlorine-free, settled water. 2. Pruning the stem by 0.5-1 cm at the bottom with each water change will keep the flower alive. 3. Check the bottom of the flower stems; if yellowing or browning is observed, these parts should be removed with scissors.