Insulation Layer Stuff Sacks

[HoytHunter24]

I am looking for advice from those in similar situations.
I am trying to figure out what size stuff sack, specifically a Kifaru 3 or 5 string sack, that will fit my Medium sized Lost Park Parka and a pair of Blackovis puffy pants.
Want to pack them as small as possible to shove in the bottom of my pack.
Which size bag do you think will fit this? Kifaru customer service said a large 5 string but i feel that may be too big.

 

[HoytHunter24]

In case anyone else has the same question. I ordered a Kifaru 5 string Small compression sack.
It fits my hooded Kifaru lost park parka (medium size) and my size large Black ovis puffy pants with room to spare.
Here it is compressed

 

[Swamppirate]

Thanks for the info!