
das Ries
ream
A unit of measurement for paper, usually consisting of 500 sheets.
Für das Projekt benötigen wir ein ganzes Ries Druckerpapier.
For the project, we need a whole ream of printer paper.
ream / Ries
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ream
A unit of measurement for paper, usually consisting of 500 sheets.
Für das Projekt benötigen wir ein ganzes Ries Druckerpapier.
For the project, we need a whole ream of printer paper.

Ries
A geographical name for a large, circular depression in southern Germany (Nördlinger Ries) that was formed by a meteorite impact.
Das Ries ist eine der am besten erhaltenen großen Impaktstrukturen der Erde.
The Ries is one of the best-preserved large impact structures on Earth.
The two meanings are very different. The context makes clear what is meant. If the topic is paper, sheets, or printing, the unit of measurement is meant. If the topic is geography, a crater, or southern Germany, the landscape is meant.
Ich habe noch ein halbes Ries Papier im Schrank.
I still have half a ream of paper in the cupboard.
As a unit of measurement, 'Ries' (ream) is used almost exclusively in connection with 'Papier' (paper). Typical phrases are 'ein Ries Papier kaufen' (to buy a ream of paper) or 'ein Ries Druckerpapier bestellen' (to order a ream of printer paper).
Der Büromateriallieferant hat uns zehn Ries Papier geliefert.
The office-supply provider delivered ten reams of paper to us.
In the geographical meaning, 'Ries' is a proper noun. It is almost always used with the definite article 'das' and is often specified with 'Nördlinger': 'das Nördlinger Ries' (the Nördlinger Ries).
Das Nördlinger Ries entstand vor etwa 15 Millionen Jahren.
The Nördlinger Ries was formed about 15 million years ago.