The leaf grade system (commonly called the pekoe grading system or orthodox grading system) is the standardised classification framework used in Indian and Ceylon (Sri Lanka) orthodox black tea trade to categorise teas by leaf size, intactness, and tip/bud content. It does not directly measure flavour or quality — it describes the physical form of the manufactured leaf. The grade designation communicates immediately to buyers what size and type of leaf is in a given lot, what extraction rate and cup character to expect, and what price tier is appropriate.

In-Depth Explanation

The leaf grade system emerged from the Indian and Ceylon colonial tea trade of the nineteenth century, developing out of the commercial need to categorise and consistently describe lots at auction without every buyer needing to physically inspect each lot. The system was standardised through the British auction houses (Mincing Lane in London, then Colombo and Calcutta/Kolkata auctions) and remains in use today.

The full grade hierarchy:

Grades fall into two primary divisions: whole-leaf grades and broken/small grades.

Whole-leaf grades (intact leaf):

Broken leaf grades:

Small grades (for tea bags):

Key points:

1. The system grades physical form, not quality: an FTGFOP lot from a mediocre estate may be less enjoyable than an OP lot from a premier estate. Grade is a physical description.

1. “Orange Pekoe” does not mean flavoured with orange: the “orange” refers historically to the Dutch House of Orange, a prestigious quality marker in early colonial tea trade.

1. The system applies primarily to orthodox Indian and Ceylon black tea: Chinese teas, Japanese teas, and oolongs use entirely different grading systems.

1. Grade affects extraction: smaller grades (dust, fannings) extract faster and produce more colour and strength per gram. Whole-leaf grades extract slower and produce more nuanced cups.

Common Misconceptions

“Higher grade = better flavour.”

Grade indicates physical form, not taste quality. A TGFOP from a good estate brewed correctly will taste excellent; an FTGFOP from a poor estate may not. Grade and flavour quality are independent variables.

“Orange Pekoe is a type of tea with orange flavour.”

Orange Pekoe is a grade designation for long, whole, clean black tea leaf. There is no orange fruit involved in the taste, production, or naming.

Social Media Sentiment

• r/tea: The grade system is one of the most frequently misunderstood aspects of black tea — particularly the “Orange Pekoe” confusion. Experienced members regularly provide explanations of what the grades mean.
• Tea communities: Enthusiasts value the grade system for choosing teas by intended brewing method (whole-leaf for gongfu-style, fannings/dust for quick strong breakfast cups).

Last updated: 2026-05

Related Terms

• FTGFOP
• Flowery Orange Pekoe (FOP)
• Orange Pekoe Explained
• Broken Grade
• Dust Grade
• Orthodox vs CTC

Research

• Harler, C.R. (1963). Tea Manufacture. Oxford University Press.
  Summary: Provides a comprehensive account of the orthodox grading system from BOP through FTGFOP, explaining the sieving and sorting processes that produce each grade and their commercial applications.

• Ukers, W.H. (1935). All About Tea (Vols. 1–2). The Tea and Coffee Trade Journal Company.
  Summary: Documents the historical development of the pekoe grading system in the nineteenth-century Indian and Ceylon trade, including the origin of the terminology and its standardisation through the London and colonial auction houses.