Tech Monthly readers' photography project: scale

"I wish I was that big....". Taken in Valencia's fab zoo. Photograph: moses67/GuardianWitness

"Piccadilly dinosaur". A tiny toy dinosaur shot as a silhouette looking up at the lights of Piccadilly Circus. Photograph: ID5127206/GuardianWitness

"Air show!" Took this shot from RAF Air show in London. Used Nikon D800. Photograph: nexteye/GuardianWitness

"Pigeon in the Eye". A pigeon overlooking the London Eye. Photograph: AnitaMichalkiewicz/GuardianWitness

"Helping Daddy". My son (favourite colour pink) aged around 18 months 'helping' daddy in the garden; both wellies and gardening implements on very different scales. The scales have since been rebalanced, as erstwhile small son now towers over father. Photograph: Jenny Downing/GuardianWitness

"Penny Farthing race at the London Nocturne 2014". The penny farthing race was much faster than expected and an exciting race to watch as it looked like hard work . A great sight to see them all cycling together. Photograph: jshilvock/GuardianWitness

"Mini St Paul's". From the Tate Modern. Scanned 35mm print. Photograph: Tim Ranson/GuardianWitness

"Giant Redwood Trees in California". Taken back in 1991 I was with friends camping in Yosemite national park. Given the trees were so big it seemed only natural to compare their size against something else. I had my friend walk close to the cabin so had two comparisons to the tree size. Photograph: timandespen/GuardianWitness

"Weighing kittens as hard as herding cats". Kittens in foster care being plumped up. They have to weigh at least a pound before they can be adopted. Second kitty awaits her turn to jump and purr about. Photograph: fourthplinth/GuardianWitness

"Anza Borego Metal Cactus". Photograph: Jaana Lunny/GuardianWitness