Hi Iris Lambert when you say the biggest maybe you are talking about floor space. In Singapore, usually when I want to buy some organic food we were shop Super Nature at a tranquil corner just off the central artery of Orchard Boulevard in Singapore, offering 4,500 square feet dedicated to natural goodness. They established in 2001 and started off as a little store with sporadic supplies and an enthusiastic team of staff, as time passed and trickling of curious customers has, over time, grown into a solid customer base committed to an organic lifestyle , a result of firsthand experience to educate the public on the benefits of eating organic. Today, they continues to champion the benefits of living organically.In the mean time they also the leading retailer of organic and natural products, they source their fresh produce, deli items and groceries, as well as baby and children's, beauty and wellness, household, pet and garden care products. If I not wrong they might also be supplying many of Singapore's organic retailers and restaurants. Hope that help.