priceTag using CustomPainter

main.dart

import 'package:flutter/material.dart';

const Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(
        scaffoldBackgroundColor: darkBlue,
      ),
      debugShowCheckedModeBanner: false,
      home: const Scaffold(
        body: Center(
          child: PriceTag(),
        ),
      ),
    );
  }
}

class PriceTag extends StatelessWidget {
  const PriceTag({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      height: 100,
      width: 300,
      child: CustomPaint(
        painter: PriceTagPaint(),
        child: const Center(
          child: Text(
            "Coolant",
            style: TextStyle(
              fontSize: 44,
            ),
          ),
        ),
      ),
    );
  }
}

class PriceTagPaint extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    Paint paint = Paint()
      ..color = Colors.green
      ..strokeCap = StrokeCap.round
      ..style = PaintingStyle.fill;

    Path path = Path();

    path
      ..moveTo(0, size.height * .5)
      ..lineTo(size.width * .13, 0)
      ..lineTo(size.width, 0)
      ..lineTo(size.width, size.height)
      ..lineTo(size.width * .13, size.height)
      ..lineTo(0, size.height * .5)
      ..close();
    canvas.drawPath(path, paint);

    //* Circle
    canvas.drawCircle(
      Offset(size.width * .13, size.height * .5),
      size.height * .15,
      paint..color = Colors.white,
    );
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
}