You can plant now outside,inside , put in a zip lock bag, or lay on a counter. They are cactus they need little to no water


You are buying 3 pads .
You pick the size.
Please note there is no advantage to buying larger sizes as a 3 inch can outgrow a 10 inch pad in 6 months.  
 
I  advise buying 9 smaller 3 to 5 inch pads off my other listing for best price and shipping value   
 www.ebay.com/itm/233621919542