Prada all white ankle chelsea slip on monolith ankle boots FW18 chunky​

I am between a size 38 and 37.5 in Prada. I bought these 37.5 thinking it would be a perfect fit, but it’s too small on only one foot (aggravating as I don’t want to give these up!!). Worn once 😔 would trade for a size 38 in similar condition. Leather interior. Lug sole like on the loafers and mules. Neoprene type stretch material around the ankle. A bit of a platform. Truly a classic!! With original box and tissue. Scandi japandi 90s retro rave chic