Hi, I found that part to program some smd attiny13. I cant tell the difference between 150 and 200 mils. Which should I choose? Thanks! SOIC8 SOP8 to DIP8 EZ Programmer Adapter Socket Converter Module 150mil 200mil | eBay
You choose the one that fits the chips that you have. If you don’t know which package version you bought, get a 6 inch/150mm scale and read the datasheet. If that’s beyond your abilities, buy one in each size.