You can use images of single pieces of clothing (like products you saw on fast fashion sites), or full outfit photos (for example from an inspiration picture you saw on Instagram!).
Fred's World by Green Cotton is a Danish children's clothing brand. All their clothing is made from GOTS certified cotton and wool. This means that the materials are both organic, and produced under fair working conditions. The materials are sewn into clothes in Ukraine under fair working conditions. The whole garment is GOTS certified, so also in the dying, weaving, and sewing the clothing is made with high environmental and social standards.