Too heavy or not light enough? Explain a weight problem in English

The BBC's lesson on too and enough explains the basic word order: too comes before an adjective, while enough comes after it. Too marks an excessive degree for the situation; enough indicates sufficiency.

For a maximum weight, compare:

Sentence	Meaning for that limit
It's too heavy.	Its weight is above the acceptable maximum.
It isn't light enough.	Its weight needs to be lower.
It's light enough.	Its weight meets that requirement.

The negative belongs before light enough: "It isn't light enough," not "It is light not enough."

You can add the purpose so your listener knows which standard you mean: "This parcel isn't light enough for the small-parcel option."

Imagine a practice card says: "The maximum weight is 5 kg. A parcel weighing exactly 5 kg meets the weight requirement."

Here are three fictional parcels:

Parcel	Weight	Meets this weight requirement?
A	7 kg	No
B	6 kg	No
C	4 kg	Yes

B is lighter than A, but B is still too heavy for this option. C is light enough for the stated weight requirement.

Try saying the whole comparison: "The second parcel is lighter, but it still isn't light enough. We need one that weighs no more than five kilos."

That is more useful than stopping at "This one is lighter." A comparative tells you how two things relate. It does not, on its own, tell you that either one meets the requirement.

The British Council's guide to enough explains enough in terms of what is necessary. In this exercise, the stated limit supplies the standard. In an actual conversation, ask for that standard if it has not been explained.

Keep Parcel B at 6 kg. Now imagine a second practice option with an 8 kg maximum. B meets that option's weight requirement even though the parcel has not changed.

You can say: "It's too heavy for the five-kilo option, but light enough for the eight-kilo option."

This is why "It's too heavy" can need a follow-up: "Too heavy for which option?" The speaker might be talking about a service limit, a personal preference or another purpose. Do not substitute one standard for another without checking.

Meeting a weight requirement also does not prove that every other requirement is met. If the practice card says nothing about dimensions, you cannot conclude that the parcel qualifies in every respect. Say exactly what you checked: "The weight is within the limit. We still need to check the size."

Compare these two descriptions of an imaginary paperweight:

"It's too heavy for the display stand."

"It isn't heavy enough to hold these papers in place."

The first description calls for less weight for its stated purpose. The second calls for more. Both sentences can be grammatical, but they do not mean the same thing.

Before rewriting a sentence, ask yourself: "Does the speaker want more of this quality or less?" For the parcel exercise, too heavy calls for less weight. Not light enough also calls for less weight. That is the meaning you need to preserve.

Do not treat every adjective pair as a mechanical replacement rule. Keep the original purpose and check the resulting meaning rather than swapping words because they look like opposites.

One person has the parcel weights; the other has the maximum weight. Ask each other for the missing information, then decide which parcels meet the weight requirement.

Explain one rejection with too and again with not enough. For Parcel B under the 5 kg limit, that gives you: "It's too heavy" and "It isn't light enough."

Then change the maximum to 8 kg. Your partner asks, "Is B still too heavy?" Answer using the new limit, not the result you memorised earlier.

Finish with one sentence that separates comparison from suitability: "B is lighter than A, but under the original limit neither is light enough."

If you missed the number, clarify it before doing the exercise. The guide to checking fifteen and fifty in English offers ways to confirm a spoken number without pretending you understood it.