This jumbo egg over 68 grams intrigues consumers on the shelves and reveals a curious detail about the age of the hen in the farms.

Written by Viviane Alves

Published on 27/05/2026 at 11:22

Updated 27/05/2026 at 11:23

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Classification by weight, bird structure, protein feed, and artificial light help to understand why some eggs reach the jumbo category

The size of eggs sold in markets follows a technical classification used by the industry. Within this separation, the so-called jumbo egg draws attention for exceeding 68 grams, standing above other categories produced on farms.

Consumers often associate larger eggs only with the birds’ diet. However, specialists point out that the age of the hen plays a decisive role in this production process. As explained by veterinarian Tarcísio Agostinho, younger birds do not yet have the appropriate body structure to produce very large eggs.

Production begins around 18 weeks of life. At this stage, the hen is still in physical development. Because of this, smaller eggs appear more frequently at the beginning of the production cycle.

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Technical classification divides eggs according to weight

The industry uses a specific division to separate the eggs marketed in the market. Each range follows defined standards according to the total weight of the unit.

• Medium: 38 g to 47.99 g
• Large: 48 g to 57.99 g
• Extra: 58 g to 67.99 g
• Jumbo: above 68 g

Jumbo eggs occupy the highest range of this classification. Farms can produce different sizes at the same time, depending on the age of the birds present in the flock.

Hen’s age becomes a decisive factor for larger eggs

Egg production continues until approximately 90 weeks of life. During this period, physical changes naturally occur in the birds.

Experts explain that jumbo eggs start to appear more frequently after 50 weeks. At this stage, the hen has a better body structure to support heavier eggs.

Tarcísio Agostinho highlights that the growth of the bird directly influences this result. Bone development and the expansion of the pelvic region favor the production of larger units in commercial farms.

Nutritious feed and artificial light also influence production

The feeding of the birds represents another important point in this process. Farms use nutritious, protein-rich feeds formulated based on soy to strengthen production.

Internal conditions of the chicken coop also interfere with the birds’ performance. Artificial lighting systems can increase egg production within the farms.

Weight, feeding, age, and management work together. These factors help explain why some eggs reach sizes much larger than those normally found on the shelves.

Had you noticed that the age of the hen can directly influence the appearance of jumbo eggs sold in markets?

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