A Full Head is generally classed as foils from the crown to the nape and recommended on short hair or for people who wear their hair up regularly
A Half Head is generally classed as foils from the crown to in-line with the top of the ears.
A T-section or Parting is generally classed as just foils through the parting and crown.
A Full Head Flamboyage is usually recommended when having this service for the first time if starting from an all over colour or if you have a lot of hair. A toner or full head colour is also usually recommended to complete the look.
A Half Head of Flamboyage is usually used for touch up of an existing Flamboyage service where a Toner is also usually recommended