One of our size 3 challengers is sporting a knotless rucksack carry in a Natibaby wrap here.
Key:
2 - you can do this with a 2
TAS 2 – this can be done with a 2 if you tie at the shoulder
Knotless 3 – With a 3 you can do a knotless finish; you’ll probably be able to do it with a 4 but you’ll have swishy tails.
4 – you might be able to do this with a 3 if you’re petite, a 4 will definitely be fine
Front carries
Kangaroo tied under the bum http://www.youtube.com/watch?v=zFr1zs7AKKU
Short Cross Carry (4) http://www.youtube.com/watch?v=Z0qrcCm6x1I
SCC with sling ring (4) http://www.youtube.com/watch?v=tvlUIMJfb3I
FWCC tied under bum (4) - need to be pretty petite for this http://www.youtube.com/watch?v=XgigzsssDEY
semi-FWCC http://www.thebabywearer.com/forum/showthread.php?150693-Semi-FWCC-with-a-Bara-Barn-%28Pics-post-6%29&p=1412215&viewfull=1#post1412215
Back carries
Rucksack variations
Rucksack tied in front (4) http://www.youtube.com/watch?v=6KOJkQaPwSo
Rucksack tied under the bum or at shoulder (2)
Rucksack knotless http://www.youtube.com/watch?v=j1O1KAfCv68
Rear reinforced rebozo rucksack (knotless rucksack with reinforced pass) (TAS 2, knotless 3) http://www.youtube.com/watch?v=q7vdFN1KemE
Double Hammock variations
Rebozo DH (2) http://www.youtube.com/watch?v=KGS_Ua1DhbI
DH tied under the bum (4) http://www.youtube.com/watch?v=4twzVlHuDEY
DH finished with single sling ring (4)
http://www.youtube.com/watch?v=8YsQO0Y-zxU
Other carries
Short back cross carry (TAS 2, knotless 3) http://www.youtube.com/watch?v=M2t8ZKEixYo
Double rebozo (TAS 2, knotless 3) http://www.youtube.com/watch?v=vkLtoOvg_Jo
Mixed pass carry (TAS 2, knotless 3) http://m.youtube.com/watch?v=EQ8EANjMu-Q
Torso carry (2) http://www.youtube.com/watch?v=f-0V63bncRE
Hip carries
Hip cross carry http://www.wrapyourbaby.com/hipcrosscarry.html
Coolest hip cross carry (HCC tied with a slipknot at shoulder) http://www.youtube.com/watch?v=gpZEIjLMu0M
semi-FWCC http://www.thebabywearer.com/forum/showthread.php?150693-Semi-FWCC-with-a-Bara-Barn-%28Pics-post-6%29&p=1412215&viewfull=1#post1412215
Other options
Rebozo on front, back or hip, but you’ll have very long tails.
http://www.youtube.com/watch?v=Qh4vRJh3IZ4