Yep I would definitely guess 4a/4b with some little 3c curls mixed in there.
Thick, highly porous but protein sensitive 4a hair
Modified Curly Girl Method

Current Staples
Cowash/Rinse-Out: Tresemme' Flawless Curls Conditioner
Shampoo: Maui Moisture's Curl Quench Shampoo
DC: Eden Bodyworks Jojoba Monoi DC/Maui Moisture's Rich Honey Hair Mask
Leave-In: Maui Moisture's Curl Milk or Shea Butter Hair Mask
Stylers: Maui Moisture's Curl Smoothie
Sealants: Maui Moisture's Coconut Milk Weightless Oil Mist