The party flag has prescribed dimensions. The general specifications of the party flag are as follows:

1. 288 cm long and 192 cm wide;

2. 240 cm long cm, width 160 cm;

3. Length 192 cm, width 128 cm;

4. Length 144 cm, width 96 cm;

5. Length 96 cm, width 64 cm.

Other provisions regarding the party flag.

"Several Provisions on the Production and Use of the Flag and Emblem of the Communist Party of China"

Article 6 Scope of use of the party flag:

1. Convening of the Party The grassroots congress holds an oath-taking ceremony for new party members to join the party;

2. Hold major celebrations, commemorations and party day activities within the party;

3. Party committees and their working departments, The party flag may be flown in the conference rooms of the representative organs dispatched by the Party Central Committee and local committees, their work departments, and the Party's disciplinary inspection organs. According to the National Flag Law, places where the national flag should be hoisted generally do not fly the party flag at the same time.

The above content refers to the Chinese Government Website - Several Regulations on the Production and Use of the Flag and Emblem of the Communist Party of China