Boa Constrictor Size

 This is meant as a general guide...there will be smaller and larger specimen.

Boa constrictor constrictor - Females can reach 14feet

Boa constrictor imperator:
Columbian/Common - Female 8-9ft Males 6-7ft
Sonoran - less than 7ft
Crawl Cay - reach 5 - 5.5ft
Caulkers Cay - reach 4ft/5ft
Honduran - rarely exceed 5ft
El Salvador - rarely exceed 5ft
Corn Island - rarely exceed 5ft
Tarahumara Mountain - Classed as True Dwarf Boa...around 4ft
Equador - rarely reach over 6ft
Nicaraagua - less than 6.5ft
Hog Island - Adult females rarely reach over 6ft
Costa Rica - Can reach 7ft but generally reach 6ft
Bahia Island - Females can reach up to 8ft
Vera Cruz - around 5ft
Cancun - Up to 7ft

CA (Central American): Depends on the mix of localities but usually about 5ft

 Boa constrictor sabogae (Pearl Island Boa) .... reach about 6feet
Boa Constrictor amarli (Short-tailed Boa) .... reach about 5feet
Boa constrictor longicauda (Longtailed Boa).... reach about 7feet
Boa constrictor occidentalis (Argentine Boa) ... 7ft +
Boa constrictor ortonii ... Largest wild female caught was 9ft, males are 3/4.5ft