Height of spikes are 7 cm and the base is 2.5cm. These spikes are only suitable for pigeons and not smaller or larger birds.
eBay
12 Bird Spikes-Outdoor Plastic Anti Cat and Bird Deterrent Pigeon Animal Defender Spikes Anti Bird Spikes to Keep Birds Away
Aliexpress UK
【Upgraded Design】 - Use pigeon deterrent to replace the barbed wire and glass slag, only Keep animals away, and won't cause harm or hurting to animals/humans. 12-72 x Bird Spikes.
eBay
Bird Spikes with Stainless Steel Base,Durable Bird Repellent Spikes Arrow Pigeon Spikes Fence Kit for Deterring Small Bird
Aliexpress UK
Bird Spikes. Pigeon Spikes. Bird Deterrents. Pigeon Proofing. 【Upgraded Design】 - Use pigeon deterrent to replace the barbed wire and glass slag, only Keep animals away, and won't cause harm or hurting to animals/humans.
eBay
Gardening Bird Repellent Mat Fence Wall Spikes Bird Spikes Burglar Anti Cat Climb Anti-Bird Deterrent Spikes Straps Yard Supply
Aliexpress UK
Setup in 2-3 minutes with steel spikes that are easy to install, adjust length and split into smaller parts for use in tight spaces. 🐦 HUMANE PRODUCT THAT FITS YOUR NEEDS - Keep the pigeons off the roof, away from ledges and from pooping everywhere.
eBay
10M/5M Bird Spikes with Stainless Steel Base, Bird Repellent Spikes,Arrow Pigeon Spikes Fence Kit for Deterring Bird, Crows Cats
Aliexpress UK
Bird Spikes with 10cm Long Spike for Pigeons Keep Birds Cats Squirrels Away， Birds Fence Spikes, Protect Your Roof Garden Railing and Outdoor Walls. And small spikes are also added at the gap which can avoid small animals standing on the gap.
eBay
5/1PCS Pigeon Spikes Stainless Steel Bird Spike Bird Deterrent Wire Spikes Keep Birds Away Proof Nails for Fence Roof Blacony
Aliexpress UK
Height of spikes are 7cm and the base is approx 2.5cm. These spikes are only suitable for pigeons and not smaller or larger birds.
eBay
12-60Pcs Anti Climb Bird Spikes Fence Wall Spikes Stop Birds and Cats Sitting on Fence Cat Repellent Spike for Deterrent Burglar
Aliexpress UK
Black Bird spikes. 4Pcs 40cm Bird Spikes. for fences Easy to use, put it directly in the garden.fence for With, can entering.fence This item is a, made of plastic materials, very sturdy and. No frequent replacing!
eBay
12Pcs Fence Wall Spikes Bird Deterrent Spikes Plastic Anti Climb Cat Animal Repellent For Garden Fences Birds Pigeons Spikes
Aliexpress UK
Ideal for Fence top and gate security to prevent burglars from climbing over. 10Pcs Bird Spikes Bird Deterrent Spikes Squirrel Fox Cat Animal Defender Spikes. The bird spikes have a visual and physical deterrent to birds.It can deter pigeons or other birds from landing on your house to nest or produce droppings.
eBay
12/20Pcs Plastic Bird Spikes Detachable Deterrent Burglar Pigeons Spikes Anti Climb Fence Wall Spike for Repeller Birds Cat
Aliexpress UK