zhè shì qiǎnsè yīfu.

The sentence follows the pattern subject + 是 + noun phrase:

• 这 = this
• 是 = is / are
• 浅色衣服 = light-colored clothes / light-colored clothing

So the overall idea is This is light-colored clothing or, depending on context, These are light-colored clothes.

One important point: 浅色衣服 is a noun phrase, not just an adjective by itself. That is why 是 works here.

By itself, 这 most directly means this.

However, Chinese does not mark singular and plural on nouns the way English does, so the exact number often depends on context. Also, 衣服 can mean clothing in a general or collective sense.

So in context, the sentence could refer to:

• this item / this clothing
• this group of clothes, if the situation makes that clear

If you clearly mean these, Chinese usually says 这些:

• 这些衣服 = these clothes

Because 这 is being used as a pronoun by itself, not directly attached to the noun 衣服.

Compare these two patterns:

• 这件衣服 = this piece of clothing
  
  • Here 这 directly modifies 衣服, so a measure word is needed: 件
• 这是浅色衣服 = this is light-colored clothing
  
  • Here 这 stands alone as this, and then 是 introduces the rest of the sentence

So the measure word is not missing; it is simply not needed in this structure.

浅色 means light-colored, pale-colored, or a light shade.

It does not name one specific color. Instead, it describes the general color category of something. For example, clothes can be:

• 浅色 = light-colored
• 深色 = dark-colored

So 浅色衣服 means light-colored clothes, such as white, light blue, beige, pale pink, and so on.

Because in Chinese, short and common modifiers can often go directly before a noun without 的.

So both of these are possible:

• 浅色衣服
• 浅色的衣服

Both mean light-colored clothes.

The version without 的 often sounds more compact and noun-like, almost like a set phrase. The version with 的 can sound a bit more explicit or descriptive.

So 浅色衣服 is normal Chinese, not a mistake.

It can mean either, depending on context.

衣服 is often used as a general word for clothes or clothing. Chinese nouns usually do not change form for singular vs. plural.

So:

• 衣服 can mean clothes / clothing in general
• if you want to emphasize one item, you often add a number and measure word:
  • 一件衣服 = one piece of clothing

In this sentence, 衣服 feels fairly general, so English may translate it as clothing or clothes, depending on context.

It is understandable, but the most natural wording depends on what exactly you want to say.

The given sentence can sound natural in a sorting or labeling context, for example:

• 这是浅色衣服，那是深色衣服。
• This is light-colored clothing; that is dark-colored clothing.

But in everyday conversation, native speakers might more often say:

• 这件衣服是浅色的。
  = This piece of clothing is light-colored.
• 这是浅色的衣服。
  = This is light-colored clothing / These are light-colored clothes.
• 这些衣服是浅色的。
  = These clothes are light-colored.

So the original sentence is fine, but it sounds a little concise or category-like.

In 衣服, the standard pronunciation is:

• 衣服 = yīfu

The second syllable is usually a neutral tone, not a full rising tone.

So although 服 by itself is pronounced fú, in the common word 衣服 it becomes light and unstressed: fu.

The whole sentence is pronounced:

• zhè shì qiǎnsè yīfu

A few pronunciation notes:

• 这 = fourth tone
• 是 = fourth tone
• 浅 = third tone
• 色 = fourth tone
• 衣 = first tone
• 服 = neutral tone in this word

Because 浅色衣服 is functioning as a noun phrase: light-colored clothing / light-colored clothes.

Chinese commonly uses 是 to connect:

• a subject
• with another noun or noun phrase

So:

• 这是老师。 = This is a teacher.
• 这是衣服。 = This is clothing.
• 这是浅色衣服。 = This is light-colored clothing.

If you want to describe a specific item's color more directly, Chinese often uses a different structure, such as:

• 这件衣服是浅色的。

That sentence focuses more clearly on the clothing being light-colored.