ant-design-vue/antdv-demo/docs/tabs/demo/size.md

#### 大小 大号页签用在页头区域，小号用在弹出框等较狭窄的容器内。 #### Size Large size tabs are usally used in page header, and small size could be used in Modal.

<template>
  <div>
    <a-radio-group v-model="size" style="margin-bottom: 16px">
      <a-radio-button value="small">
        Small
      </a-radio-button>
      <a-radio-button value="default">
        Default
      </a-radio-button>
      <a-radio-button value="large">
        Large
      </a-radio-button>
    </a-radio-group>
    <a-tabs default-active-key="2" :size="size">
      <a-tab-pane key="1" tab="Tab 1">
        Content of tab 1
      </a-tab-pane>
      <a-tab-pane key="2" tab="Tab 2">
        Content of tab 2
      </a-tab-pane>
      <a-tab-pane key="3" tab="Tab 3">
        Content of tab 3
      </a-tab-pane>
    </a-tabs>
  </div>
</template>
<script>
export default {
  data() {
    return {
      size: 'small',
    };
  },
};
</script>