When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Techart Formula, look to be 18". Nice wheels, I've always admired them on essentially every Porsche model - multiple generations of 911 and Boxster/Cayman. I believe they are fairly heavy but don't have the exact numbers.
Here's some extra info for you. Hard to see through he red on the paper but it details the two different fitments for 993 narrow body and wide body.
NB/WB front = type "151" (18 x 8.5 ET 40)
NB rear = type "152" (18 x 10.5 ET 60)
WB rear = type 153" (18 x 10.5 ET 42)
Also, I will leave you with the best 993 picture I've ever seen with these wheels. This car looks so great and certainly the ride height helps pull it off. This pic has spent a lot of time on desktop background. Love the stance/fitment.