Size 8 in EU can refer to different types of products, but assuming the question is about shoe size, here are some possible conversions based on the search results:

• UK size 8 = EU size 42
• UK size 8 = EU size 39
• UK size 8 = EU size 43

Its important to note that shoe sizes can vary slightly between different brands and manufacturers, so its always best to check the specific size chart provided by the seller or manufacturer to ensure the best fit.