What Size Should You Buy First?

Larger packages cost less per gram. Whether that matters depends on one constraint.

The post-opening window

Sellers of matcha commonly suggest finishing an opened package within two weeks to a month.

The date printed on the package applies to the unopened product. Once air reaches the powder, color and aroma begin changing regardless of that date.

Powder has far more surface area than whole leaf, so oxidation and aroma loss proceed faster.

Do the division

At 20 g per serving, 300 g yields 15 cups.

• One cup daily → about 15 days
• Every other day → about a month
• Twice a week → about two months

Daily drinking makes 300 g appropriate. Twice a week means the second half gets consumed after flavor has declined.

Lighter servings extend the count, and the timeline with it.

Foodservice sizes are not for households

A kilogram is 50 cups at 20 g. Even daily, close to two months.

Portioning into sealed containers helps, but each transfer introduces temperature change and condensation risk.

The case for sticks

Individually sealed portions mean essentially no post-opening deterioration.

Suited to infrequent drinking or travel. Strength is fixed and the unit cost is higher.

Start small

The first purchase happens before you know whether you like the product.

Matcha-forward and sugar-dominant formulations taste quite different. Buying a small quantity, then scaling up once you have found something you like, wastes less overall.

What you control afterward

Only light, heat, and moisture.

Refrigerating? Let the sealed container reach room temperature before opening. Opening it cold causes condensation inside, and moisture accelerates deterioration sharply.