ant-design-vue/components/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 defaultActiveKey="2" :size="size">
    <a-tab-pane tab="Tab 1" key="1">Content of tab 1</a-tab-pane>
    <a-tab-pane tab="Tab 2" key="2">Content of tab 2</a-tab-pane>
    <a-tab-pane tab="Tab 3" key="3">Content of tab 3</a-tab-pane>
  </a-tabs>
</div>
</template>
<script>
export default {
  data () {
    return {
      size: 'small',
    }
  },
}
</script>